As promised Crytek have released the "DX11 Ultra Upgrade" patch for Crysis 2 and also the high-resolution texture pack is now available. The update intros DX11 as well as graphical improvements to not only the DX11 version of the game, but the stock DX9 version. There are three packs available, patch 1.9 enables DX11 support but there will be separate downloads on top of patch 1.9 in the form of "DirectX 11 Ultra Upgrade," DX11 Tessellation Pack," and "High Res Textures."
The DX11 patches will obviously give higher-fidelity visuals, but the patch also includes graphical and performance improvements under DX9. After the patch 1.9 is installed, DX9 users will gain real-time local reflections and contacts shadows. DX11-based gamers will gain hardware tessellation, parallax occlusion mapping along with various shadow, water, particle, depth of field and motion blur enhancements.