http://www.avsforum.com/avs-vb/showthread.php?p=8279993&&#post8279993
For those who don't know, Amir is the VP of the Windows Media group at Microsoft.
Amirm said:As I suspected, there is no merit to these stories. Vista will not in any way block playback of HD content (HD DVD or otherwise). We do have facilities in the operating system for applications to query whether there are unsigned drivers in the kernel, and as such, may be a potential risk to secure playback of high-def content. But it is up to the application to decide what to do with such data. They can, as they do today on XP, playback anything they like and ignore that information. And to be clear, no request has been made from content owners to block playback of HD content in Vista in 32-bit mode.
For those who don't know, Amir is the VP of the Windows Media group at Microsoft.