One photo of this build was released by Microsoft in response to many that thought Media Center would not be included and working in the next version of Windows, Windows 8. Shown is a picture of the old Windows 7 Media Center working, but it is unknown if Microsoft is working on changing it. 

https://twitter.com/BuildWindows8/status/167276289286352896/photo/1

Good grief. We said "Media Center will definitely be part of Windows 8" in blogs.msdn.com/b/b8/archive/2… pic.twitter.com/6oNUOlHv