But it's still impossible to replace RTX 3090 with this new Mac Studio because games just will not run on MacOS.
Proton on ARM Mac's would involve Rosetta and while that does a surprisingly good job of running x86 on ARM I'm not sure it's up to the job of running games at high speed...
Some games are a stable 4k120 and others are more like 4k75.
I feel the 3090 could feasibly drive 5k60 as a result.
GTAV on Win11 Arm VM - okay, but not great.
GTAV on Crossover - much much better, lack of joystick support (but that's a crossover issue)