The way I understand it is that every anticheat needs to be overhauled as they can no longer tap into the kernel/get kernel access.

Yes, if we assume that various institutions (cough cough looking at you EU) allow MS to remove kernel access.

So the anticheat has to eun in userspace.

VSB-E isn't really "user space" but your point about the kernel is valid.

hich is why anticheat should

The word "should" is doing some heavy lifting in that sentence. Even if it COULD that doesn't mean devs will allow it nor does it mean that existing games will get updated on EITHER platform. Removing a kernel level anti-cheat could easily be the death of some older games on Windows as the owner simply doesn't want to put the money into making it work.

I'm honestly not too sure how possible it is to make VSB-E work on *nix either, since it appears to use Microsoft Hyper-V technologies at its core and those wouldn't be available in *nix. That means that we'd be back to Game Devs having to specifically write anti-cheat for *nix...which is something they can already do if they want.

VSB-E is interesting but I'm not convinced its going to do anything for Linux Gaming at all. Hopefully I am wrong. :)