On one side, if most of the CPU usage is for RT, I'll be very disappointed. Why can't game developers push other boundaries like NPC AI by using up on the CPU? I hope that's what they are doing, not just "moar graphs".
In the other side, anyone who uses up 90% of 8 cores can use 50% of 16 cores, or even 90%. If threading is well made, it can saturate anything. Ok, I think there's a point where it won't help much (8 cores give the maximum feature), but I really hope it can scale sideways too. Especially since they ask for current-gen CPUs, then last gen 12 or 16 cores should work nicely.
We need benchmarks! Go as far back as Zen 2 if possible!