Here's my usolicited view:
(and make no mistake, people. The 'powers that be' are watching threads like this to get ideas)
Apple basically dominates the portable music arena with the iPod. It is the '800lb gorilla'. Expensive, but a 'must have' for the 'todays' generation.
Digital media is the coming wave. The music wave is already here, but the video wave is still cresting. iTunes fills a huge void for music and is the standard for people that actually buy music. If Apple can marry the iTunes legacy with digital video, then the 800lb gorilla gains a pound or two.
Alongside the digital video wave is the PORTABLE digital video wave. And by portable I mean wireless, both inside the home and out. If Apple can turn the musical legacy of iTunes into a full-range digital media source, then

TV will have a MUCH better chance of catching on. And if Apple can do that AND then simultaneously make your digital media stored at home (and purchased from iTunes) available ANYWHERE you have a portable device, then IMHO, Apple wins.
Think about it. What makes iPods and iPhones so attractive to people? The ease of use...the GUI that any idiot can use right away without a big manual. If Apple can take that ease of use and apply it to fully wireless and portable digital media, then the 800lb gorilla becomes Godzilla.
Can they pull that off without cooperation from Fox, Warner Bros., etc? I don't think so....the big problem will be to satisfy all the execs who have their hand out and want a big slice ($) of the pie. For this to all work, prices must be low enough that you make the $$ on volume. Studio execs don't think this way, so the challenge is there.
Myself? I love the iPhone so much I bought an iMac. I'm waiting on one more upgrade and I'll buy an

TV. I still use my 1st gen Nano. And I buy Apple stock every month. I think they're on the right track....the question is is can Apple keep everything 'on track' and still satisfy today's "I want it all NOW" attitude???