Windows 8 is good and bad. It's pretty easy and nice once you're used to it, but a lot of features are hidden for some reason, maybe because of tablets having a clear start button and all. Also, it feels like two operating systems in one. The transition from Metro (or whatever they end up calling it) to standard desktop is really jarring, as the two have almost nothing in common. On the other hand, it runs a lot faster and boot times are great.
I really want to know if Valve can make Linux gaming a reality this time around. I recently started dual booting with Ubuntu, and to be honest, it's way better than Windows.