In a surprising move, Microsoft has released a beta platform update (KB2670838) that brings
some of DirectX 11.1 features to Windows 7. This platform update enables improved features and performance on Windows 7 SP1 and Windows Server 2008 R2 SP1. It includes updates to the following DirectX components:
Direct2D
DirectWrite
Direct3D
Windows Imaging Component (WIC)
Windows Advanced Rasterization Platform (WARP)
Windows Animation Manager (WAM)
XPS Document API
H.264 Video Decoder
JPEG XR codec
Download: Platform Update for Windows 7 (KB2670838)