Current and next-gen PC hardware will always be optimized for Windows first, with some technologies being straight-up limited exclusively to Windows.

Not that gamers are losing out on anything valuable, of course. I run Debian stable and spend quite a few times gaming on it, and it turns out almost all the games that won't run on it aren't games worth playing altogether. But this is an opinion of the negligible minority like you and me. The Consumers will obviously care for the latest.