Because although we've always been able to add these codecs to Media Center anyways, the real crux has been when you try to watch the very same content on an extender -- like the Xbox 360.

ENGADGET: Windows 7 to natively support DivX and transcoding? HD

Currently getting 3rd party codecs like DivX and Xvid working within Windows Media Center has worked well enough with 3rd party solutions, but the next best thing is native support.

ENGADGET: Windows 7 to natively support DivX and transcoding? HD