At CES, one of the big hits were the WMV HD demonstrations and sampler DVD being given away.  WMV HD is just Windows Media Video 9 Series optimized for High Definition playback with 5.1 to 7.1 surround sound WMA. This was also shown at Bill Gates' keynote, and the clips are now available for download.  Over a dozen IMAX films will be coming out in WMV-HD for your viewing pleasure on a 2.5Ghz+ machine.  Why IMAX?  The film is actually much larger than traditional motion picture film and captures more detail- a great demonstration of the technology of Windows Media delivering HD quality at a fraction the size of “traditional” HD broadcast and 6x the quality of DVD.  Just imagine how many HDTV channels could be broadcast over cable and satellite through the use of this technology, not to mention with the new HD consumer DV-cameras hitting the market.

Check out http://www.wmvhd.com for more samples
Interested in creating your own WMV HD clips?  Check out Ben Waggoner's Zero to HD in 60 Seconds How-To Article.