I really only use PCs for gaming, and I'd be just as happy if I never saw more of Windows than the Steam client, assuming a larger selection of games was available through its interface. As far as I'm concerned, Windows is just the freight train that games have to drag along behind them.
Just about every other modern operating system allows games to crank the detail levels. Vista especially limits the ability to move the sliders to the right. I've read many, many posts in support forums for several games that verify this.
Regardless of the operating system I use, I strongly doubt that Microsoft will produce anything that will satisfy my craving for "getting my hands dirty". Windows is just too easy to hose without a ridiculous amount of study.
