Cool Crysis 2 DX11 Tessellation
http://www.youtube.com/watch?v=PElslY2p8Ac

Fun starts @ 0:50, this is for the new members that haven't seen this nice tessellation vid, it was made on an OCed 580 + i5 760 @ 4.2, even before all the subsequent drivers smoothed the game out for everyone.
*I put a new vid up tonight and found this interesting again after having seen other nice graphics games like Batman.