You probably are afraid that the new Windows 8 won’t be compatible with your favourite games. That’s totally wrong, Windows 8 it’s pretty much the same with Windows 7 (except the brand new start menu, and a few other improvements), so nothing to worry about.
They also added a few new games to the Windows 8 like Pinball FX2, Flow, Air Soccer, and even more…
The current games are more optimized for touch displays, but they can be played with the keyboard and mouse too.