The Duff CEO with a Windows-Logo on his forehead: "Gamers use Windows because of its' user experience not our de facto monopoly."
Next Image: Duff CEO with Windows-Logo in front of a "Out of Business" sign. Subtitle: "30 minutes after SteamOS is released"
Edit: Yo, I'm not saying this is gonna happen. I just want to say that Windew's UX sucks ass.
And if you like playing certain games with kernel anti-cheat, the only way you're getting away from Windows is on console. Unless gamers jumping from Windows to Max/Linux increase by improbable orders of magnitude, that's not changing anytime soon.