I think that this is all a bit premature. Apple I think will be more likely to move more into the consumer market perhaps in concert with players like Philips. A Rendezvous enabled home entertainment system would be a pretty good start.
The iMac as a digital hub connecting stuff from the den to the living room. I mean not everyone wants their iMac or iBook connected to the home theater? But a box of some sort that interconnects your stereo to the iTunes on your computer - that's a neat idea.
I've been considering knocking together a small box myself to do just that - but Apple would do it better.
This is where the iTablet as headless display / remote control might come in - Cringley has a lot to say about that too - but I'd just use my SonyEricsson T610 as a remote control... unless that iPod-phone happens...
I guess we'll find out a bit more in a little under 15 minutes...