It’s seemingly TB3 actually. And has been around some time.
Their specs on it are very muddled and I didn’t receive a conclusive answer a year ago when I emailed them:
Combination of 4 fiber cores and 7 copper cores, durable strain relief, and active Thunderbolt cable ends provides unmatched durability and performance across the full length of cable…
“4 fibre cores and 7 copper cores” – my question to them was:
Do the copper cores mean it can also power devices up to a certain wattage, or is the cable only fibre optic, so they’re only for strain relief or similar?
Corning released around the same time their own unpowered optical TB3 ones up to 50m, and their 10m one was ~$400. So I never understood Cable Matters cheaper pricing either.