Please do not take MaxTech too seriously, is very Mac biased and not a 3D guy, running synthetic benchmark is one thing, real work is quite a different one.
We have a 16" MBP with a M1Pro(10coreCPU) and is already plenty capable for working in 3D, from our tests on real scenes is about as fast as a 12core Intel/AMD desktop machine, is safe to assume that the Ultra will be about twice as fast.
here is a video I've recorded on the MBP, Vray now runs much faster since they fixed a few things including the interactive denoiser:
I'm not sure the MP will be showed this summer, most likely for late 2022, it will probably use a smaller TSMC node that wont' be ready for the summer.