Not that anyone can afford a 1080p TV/ Projector yet, but the media is now available:
http://www.amazon.com/exec/obidos/search-handle-url/102-7338215-1038535?index=dvd&field-keywords=WMVHD

Microsoft is finally catching up and providing movie trailers, though strangely not using h.264 ;)
http://www.microsoft.com/windows/windowsmedia/content_provider/film/ContentShowcase.aspx