There will be no need to waste $2k on a gaming PC when an ARM system with SOC will do the same and more for a fraction. No one will care for how much Ram you can install or what grade power supply to buy. If the M1 is the weakest processor of whats next to come, Apple will be sitting on real dominance. Linus and all the other gaming channels will need to change their tune.
This is a non-sequitur. It's been blindingly obvious for more than a decade that performance could be drastically improved by switching away from x86/64 which is essentially a legacy architecture and is more or less just used for backwards compatibility. It doesn't matter how fast a chip theoretically is if nothing (or nothing requiring that speed...) runs on it. The
real achievement, if it actually works as well as it's supposed to, is the Rosetta translation layer.
Unfortunately for those hoping for revolution in
usable high performance silicon, backwards compatibility is king. This is almost the entire reason Windows continues to exist.
Apple's new ARM chips will have almost no effect on the gaming market because very few AAA developers are making games for OSX to begin with. There are more games than ever on Macs, but they're pretty much all resource light indie or casual games which will already run on most anything. It will have little effect on the high end workstation market because most such software doesn't run on OSX either. Basically the only categories of resource intensive software which routinely have OSX versions are DAWs and the Adobe suite. Even a Windows shop where DAWs and Adobe CS are their primary applications isn't going to switch to Macs overnight due to the management overhead.
Apple will continue to exist in it's own little walled garden. Even if Apple's new ARM chips work out perfectly there will be no mass migration to Apple hardware unless Intel takes the better part of a decade to pick up the ball they've dropped and not come up with an appropriate response. Unless that happens there will just be a few years of Mac users bragging about their Photoshop or Premiere rendering faster before Intel catches up since it will take at least that long for enough Windows focused software companies to bother with Mac versions.