Ubuntu holds its own
itweb.co.za
itweb.co.za
In comparison, all other Linux UIs look like either something from 10 years ago, or simply a bad copy of OSX.
Also: They made the deal with Steam!
Last month I bought two games only because they have Linux versions: Euro Truck Simulator 2 and Brutal Legend.
And with the very latest AMD driver (13.4) they run great.