Crysis 2 DX11 update detailed by Crytek
Crytek's detailed in a post, since pulled, on the MyCrysis website the DirectX11 update for Crysis 2.
Called the DirectX11 Ultra Upgrade, users will get "a free visual improvement add-on introducing DirectX11 support as well as a wealth of graphical improvements and performance optimization for both DX11 and DX9 API's."
There'll also be a high textures pack for DX9 users.