One of the code commits alone for this new IGP is over 16,000 lines long. This code commit added compiled shader program support for XvMC/XvMC-VLD on the IGDNG. Of course, the new 16,860 lines of code added to this driver is mostly hex, so there really isn't much exposed. However, the file extension on these compiled shaders are "gen5", hence this new IGP is likely indeed the Intel GMA X5000 series. A second code commit to the Intel DDX minutes later enabled this XvMC and XvMC-VLD support within the open-source driver.
XvMC is a step better than plain old X-Video / Textured Video for video decoding, but still it would be wonderful to see VDPAU or VA-API support within the Intel driver on capable hardware.
As the IGDNG nears its unveiling, we anticipate seeing more code commits related to this fifth generation Intel IGP. It's good to see though that this code is coming out early so that there will be stable open-source support ready once these Intel motherboards start appearing.