I have tried Crysis 2 with DX11 pack with maximum graphic setting - looks great, but there are several bugs of tessellation: for example there are many cyllindryc objects in game, that are not tessellated.

Examples:
http://img694.imageshack.us/img694/6505/example1p.jpg
http://img706.imageshack.us/img706/122/example2mc.jpg

How about adding smoothing with tessellation+displacement or pn_triangles method?