Windows Media Extender

Bill Gates announced at the CES the Windows Media Extender with some prototypes.

But something I am not sure if it's a good news is that you can only connect your extender to a Windows Media Center box.

Does it means you can't have access to your media stored on a Windows XP edition ?
If yes, no advantage, very disappointing because some products exists already like Homepod for example which let me have access to my PC (Windows XP).

The concept is cool anyway, I like the idea of an Xbox Media Extender.

See this page to know more from Microsoft.