The problem, of course is Hulu, Netflix, iTunes and any other content distribution hub that they don't directly control. I know a LOT of people who've dumped television altogether and set up media consoles and just use those for their TV viewing.

(and this doesn't get into potential future services like OnLive)

It's a very goddamn rare day when Comcast looks positively benevolent with their 250 gig cap.