Steam Big Picture has now exited the beta stage and players around the world are now able to get a tailored Steam experience on their TV sets. You can update your Steam to include the new interface now, and to celebrate this Steam are having a sale on the "most Big Picture friendly" games in their library. That is games with full controller support.
Here's a selection of some of the discounted games:
Castle Crashers (-66%)
Limbo (-75%)
Alan Wake (-75%)
Portal 2 (-75%)
Magicka (-75%)
Left 4 Dead: GOTY Edition (-75%)
Lego Batman 2: DC Super Heroes (-66%)
Sonic Generations (-75%)
Head over to Steam for the full list of discounted games.