The great news about Adobe Flash Player 11 is the mainline 64-bit support. The x86_64 Flash binary is finally in-sync with the 32-bit version for all supported platforms. This is one of the best parts about Flash 11 after Adobe's 64-bit support has been neglected for years.
Other benefits of Adobe's Flash 11 is that it's much faster, Stage 3D API support (3D Flash), new audio compression support, H.264/AVC software encoding support, JPEG-XR support, and various other features.
While there is NVIDIA VDPAU and Broadcom Crystal HD support for video playback acceleration (that's been around since Flash 10), there still is no VA-API (or XvBA) video acceleration support for pushing Flash to the GPU for other non-NVIDIA graphics processors and drivers.
Adobe Flash Player 11 can now be downloaded from Adobe.com.