Windows 8 seems like a giant waste in terms of gaming. It brings nothing new to the table, other than Xbox 360 compatibility which isn't important to me.
Everything I see seems to indicate that Windows 8 is purely a gimmick. Genuinely, I think I'll stick to 7 until they offer some actual gaming improvements, I don't need any of those features. I'm not saying everyone should share my opinion, that's just my stance.