I agree, and because I was thinking that it would make a lot of sense to have the entire Mac lineup running on Apple silicon, I thought t that they would announce a new Pro at this latest event. But it was was a dual product line reveal instead.
The current redesigned Mac Pro and XDR have only been available for a little over a year. So I’m now thinking they’ll debut a new M chip along with a new Pro model sometime within a year, maybe even during or soon after the big annual fall shebang.
Me as well…I have one and it’s from 3 to 16x as fast as my 2019 iMac in Lightroom depending on task. I was looking for a M1 Pro mini to replace both the iMac and a 2014 mini …moving house file services to the new mini and doing Lightroom solely on the laptop (albeit with an LG or the new monitor) rather than having 2 Lightroom catalogs and doing export/import for images from traveling. Wanted the M1 Pro in case I decided the laptop only approach didn’t work as well so I could easily go back to dual computer approach. With the Studio…even though it’s Max chip not much faster than an M1 Pro for Lightroom still image tasks (based on a single video I could find contrasting the two so far)…it’s more money and that seems like a wasted machine to spend on file server services. The M1 mini doesn’t (I think, still researching that but the 16GB limit appears to be limiting for still image work) have enough power to be the home Lightroom catalog machine.
So…I’m reevaluating my options a bit.
It is…and since the 27 iMac was summarily cancelled I don’t think we will see a larger iMac…the Studio and display are the replacement.
The 27" iMac is clearly a specific product, and it has been discontinued. The iMac as a ‘type’ of Mac has transitioned to Apple Silicon. But I don’t think that necessarily means there will never be an iMac with a larger screen.
Small addendum: My interpretation about the comment at the end of the presentation saying that the only Mac left to transition to Apple Silicon was the Mac Pro, is that it wasn’t about the iMac at all. If they hadn’t said anything, a lot of people would have wondered whether the Mac Studio was replacing the Mac Pro. I think they called out that the Mac Pro was still to transition to put any fears to rest. I don’t think it was intended to signal anything at all about future iMac plans. It would not surprise me if they’re waiting for the M2, and when M2 iMacs come out there is a 27" model. (It would also not surprise me if there wasn’t!)
I’ve up in a comment in Product Feedback - Apple and I’ve sent a twitter message to @tim_cook telling them that this is not a good idea for many of us iMac users.
I think a semantic discussion about what we think iMac means is probably irrelevant to what Apple thinks, which indicates that the large screen iMac is EOL. Would I be surprised by another large screen iMac appearing at some point? No, but the Magic Eight Ball isn’t promising at the moment.
The problem with that interpretation is that they very specifically said there was “one” more Mac to transition and it was the Mac Pro. They didn’t have to have that “one” in there to reassure people about the Mac Pro. These things are really tightly scripted and recorded and so there was no mistake about what they were saying. It stretches things a lot to imagine that the “one” really means, “except for these other edge cases.”
I’m afraid that sounds like quite a convincing argument to me.
I really wish it weren’t though. I think it also bodes poorly for an M1 Pro Mac mini to replace the $899 Intel Mac mini. 
The news apparently was in another thread, but Are Technica, a usually reliable source, had an update at the bottom of its article on the fate of the 27-inch iMac:
Update : Apple confirmed to Ars that the 27-inch iMac has reached end of life.
I think that’s pretty definitive.
Yes, I noted the Ars Technica news above
As I look to the future for transition to the Apple chips (I have the last iMac Pro) I was wondering about the possibility of using the iMac as a monitor and getting a Mini or a Studio, and then later getting a monitor, or selling the iMac when it still has value and transitioning from there.
I am even thinking about a MacBook Pro with a dock system, as I do a lot of photography and the portability would help, but with more applications working with the iPad (like the Capture One), I may be able to have a desktop and a good iPad.
I still don’t think that Apple confirming this particular product is gone means there will never be an iMac with a larger screen. Let’s come back to this in a year 
How about 50 years? I bet there’s no large screen iMac then.
Although the two iMacs drew closer to each other in recent models, they started out as distinct, discrete models. The 24-inch had an inferior screen, less configurability, and no niceties like sockets for internal RAM. Apple pulled up the specs of the 24 to make it more like a smaller 27, but it was clear that the 24 was directed more toward users who want the convenience of an all in one, and the 27 toward users who needed or wanted to BTO it to the max.
I think in general form, yes, they were variations on a theme, but the 24 survives as an M1 machine because it is a unique animal. The 27 (including my lifesaving 2019 that I purchased loaded when my video production needs were heavy in the first pandemic summer) is redundant when the internals of a much better machine are pulled out and boxed up separately, and paired with a better 27 inch monitor with some Mac smarts of its own.
The ports that were sometimes a giant PITA to reach (and for the record that has never felt like an issue with the 24) are now on a movable box, and overall this just makes a giant pile of sense to me.
Makes me wonder what I can get for my 18 month old imac.
There’s still a giant M1 Pro-shaped gap in the desktop machine lineup. While I would potentially be interested in taking a step up from the M1 Mini, the next “step” is big enough to require climbing gear.
Holding a 2TB SSD constant, the M1 Mini (16GB/2TB) is $1700 while the M1 Max Studio (32GB/2TB) is $2600. That’s a $900 window in which there’s basically no Mac desktop solution right now. Add the Studio Display, and there’s no 27" iMac “replacement” between $3300 and $4200.
Dave
Well the good news is there are rumors saying we will get an AS replacement for the high-end mini after all. It’s just taking longer — but it will come with M2 Pro. 
Interesting. The delivery date on the Studio Display is now out to mid-May, so by that point it might make sense to see if anything shows up at WWDC in early June.
Dave
Orders for the base version (standard glass and no-height adjustment) still show an early April delivery. everything else is sometime in May.
I actually ordered last night. I’ll have the display showing up in early April with the Mac Studio showing up later in the month.
Just to put this out there: noted technology analyst Ming-Chi Kuo is still predicting an iMac Pro for 2023 (along with Mac Pro and an updated Mac mini).
He doesn’t make a prediction about the display size, and I suppose it’s possible that Apple will make the 24” a pro-level machine, but I’d think that if Apple makes a new iMac Pro, it would be a larger display than 24”.
I’m starting to think these “rumors” are getting it wrong. There likely won’t be an iMac Pro or a high-end Mac mini. Perhaps the pro is going into existing kit, rather than we’re getting new “Pro” kit.
Within 12 months there will be an M2 along with more options and Apple will be able to broaden their existing product lines. Perhaps they will then start selling a Pro/Max variant of the 24" iMac and the Mac mini along with more ports (kind of like today the high-end 24" offers a couple more ports than the low-end).
That would encourage upsell, it would cater to more prosumer buyers, and it would still allow Apple to keep to a few simple product lines. I always got the impression Apple actually liked being able to offer a lot of CTO options.