We’ve currently got a 2019 16″ MacBook Pro with 2.3 GHz 8-core Intel i9 processor, 32GB memory, 1TB SSD and AMD Radeon Pro 5500M and our machine just crawls. It took 1 hour 52 minutes to transcode a 4 minute 50 second ProRes RAW HQ clip to HEVC 10-bit in Apple Compressor for delivery to YouTube. Below are screenshots of a typical project in DaVinci Resolve with minimal noise reduction, film emulation plugin and film grain. 3.5 fps is typical for both playback and rendering with ProRes 4444. Rendering in DaVinci Resolve or transcoding in Apple Compressor brings the whole machine to its knees. Click on images to enlarge.
Color Page 
Deliver Page
The Daejeon Chronicles 
It should change the perf ormances.
Switching from an Intel to an M1 last year was already day and night for 4K H265 420 10 bits files when applying LUTs, etc.
The playback is smooth in Resolve.
I hope so!