It's incredible how the M1 Max beats the 28 core, afterburner + quad W6800x Mac Pro in Pro Res. Really is!
Not really. Most of that stuff is superfluous. ProRes isn't GPU optimized so.... there is many thousands that is contributing not much at all ( quad W660X ). Is x86_64 ProRes all that multithreaded optimized? 4-12 cores really gong to show linear improvement on a single file decode? 28 cores to ProRes decode a simple video file wasn't necessary.
ProRes was never set up to be a ginormous CPU hog. It is suppose to coexist with other workloads. Soaks up lots of bandwidth, but the compute aspect is manageable. The M series decoders are a major win on Perf/Watt.
The AS Mac Pro is going to be tremendous, as much as I really like the current Intel Mac Pro for its performance and usability, it's going to be outclassed entirely soon imo. That's not only for pro res, but also for R3D raw, which the current Mac Pro beats the M1 Max - but the M1 Max is respectable too.
Decent change that Apple's multichip module GPU(s) scale better as a compute cluster than at a high single video stream frame-rate GPU. So yeah, in this specific niche of video processing workstation it will probably pay off. Presuming Red , Blackmagic, and others get their RAW decoders/encoders optimized it probably will work well.
Not sure though they are going to make most folks who had zero interest in buying an Afterburner card happy though. ( AMD's multiple die GPGPU, Mi250 , shows up as two GPUs at the software level. Apple may have a better interchip comm system, but seamlessly unifying all GPU cores without any NUMA hiccups will be challenging. )
The GPU is where the real battle will be, imo. The Pro Res battle with encoders/decoders is already won by the M1 Max
Not going to be much of a battle is Apple doesn't sign 3rd party GPU drivers going forward. They are signing zero of those on the macOS on M-series and could stop signing on Intel too if the relationship with AMD fizzles.
Final Cut Pro wise probably not going to be much of a battle. Multiple platform video editing depends on the update streams over time. Short term leaning to Apple, but longer term 2-3 year horizon ( multiple cards aetups of AMD and Nvidia's late 2022 - late 2023 offerings not as clear cut. )