It's an unfortunate situation for PC gamers I think.
I'm a keen PC gamer, (strategy games, and FPS games using Keyboard and mouse mostly) and likely 95%+ of the games released are Windows only. Often new games won't play under Wine or a VM (at least not in a playable state).
Quite a few indie titles tend to be cross-platform these days, often supporting Linux natively (and more rarely Mac OSX), and I thank the Devs for this.
But for the A+ titles from larger studios and publishers, it's still very very rare to have any none Windows version (other than consoles). Which is a real shame. :-/