Yea, if Windows 8 does indeed have a mandatory "you can only get to digital-game-distribution through microsoft's store" thing (is that confirmed?) then I will never, ever install it on my machine. I'm not kidding. Never. I'll hold on to Win7 until microsoft removes that absurdity from Win8, or releases Win9 without it, and if Win7 becomes untenable for some reason I'll just switch to linux or something like that.
Hopefully they aren't even going that far with it, though.