hmmm read a couple of reviews by sites that had previews of the box. Most notably is:

toms hardware
AnandTech

Appears to me to be quite a beast. Will be interesting to see what the game makers
are able to bring out. Of course Sony are yet to release details on theirs, though in all
honesty Sony realy dropped the ball on the last one. They made it incredibly dificult for
game developers and stuffed up on net support (something Microsoft has done quite
well).

i love the new RF controllers and the usb support. I think the most
telling difference will be the fact that you can connect any usb device
to the XBox 360 and it will work. You can connect a Kodak camera,
a PSP (sony hand held game), etc. No dependancy on Microsoft
only hardware. Something that I doubt Sony will ever do.