But it's not like Windows is necessarily better! I've spent far longer trying to get some games to work on there than I do on Linux. I've spent more time on random driver issues in Windows than I do on Linux. I'm quite technical, and Windows has been far more frustrating in the bad cases - especially when talking about older games.
When it gets to a point where users can run literally any game out of the box without any additional hassle, then it will be the best gaming system. Until then, this is a gross exaggeration at best.
No, that's ridiculous. It will be the best gaming system when it can run more games out of the box without any additional hassle than Windows can. I'm not sure we've reached that point, but we're damn close - since I switched to Linux full-time, there's been a handful of games that I've had trouble getting to work, but all of them were niche (or modded) games. All the big titles have worked flawlessly, and better than on Windows (since all the additional crap like launchers, background services etc. are contained to when the game is running).