This new security platform, if vendors chose to actually go ahead and use it, could mean the oppositefor Linux gaming, and cause a whole bunch of new headaches when it comes to supporting it regardless of it being via Native Linux games, or Windows games through Wine and Proton. So if anything, I would say that rather than paving the way for Linux gaming to get better, it’s just going to be another hurdle. As annoying as that is.
Just because some things may move out of the kernel-level, also doesn’t mean things will suddenly work on Linux (or get any easier to support via Wine / Proton). There will be various ways for developers to detect Linux, and continue to block it.
Just look at Destiny 2 as the easy and simple example here, they very clearly check for and completely block Linux platforms from playing Destiny 2 via Proton with no way around it.
Roblox is an additional easy example here to really make the point. Their latest anti-cheat is not kernel level, and completely blocks Linux. Something doesn’t need to be in the kernel to block Linux-based systems.
Nope
https://www.gamingonlinux.com/2024/09/microsoft-windows-kernel-changes-dont-suddenly-mean-big-things-for-linux-gaming/