the team is currently working on a DirectX 11 patch for Crysis 2. There are no details yet on when to expect it or what exactly it will do (early rumors of the patch, debunked by Crytek, suggested it would unlock an advanced graphics mode), but of course it will enable DirectX 11 compatibility for the game. Crytek says it wants to "get the best out of DX11."
The patch can't come too soon for poor PC Crysis 2 players -- as you can see above, they're really suffering. Who would bother ever playing a PC game that looked as bad as that?
[Thanks, Brian R.]