Wait until there is a selection of games that you wish to play available on linux before you go ahead and write off Windows. Also, wait for driver support to be up to snuff for what you want to do.
IMO if you REALLY want games on linux you should use it for everything possible. If everyone just sits on windows waiting for games on linux then those games are not going to come lol.
I recall reading an article here a couple months ago that steam found ported games running faster on linux, after some OS optimization, as compared with the more heavilly optimized windows version.