The more I think about the state of the iOS universe since the recent WWDC keynote, the more I think there's an important piece of the puzzle coming soon. There were a few rumors before the keynote that there would be news regarding a new version of the Apple TV. With Google's recent unveiling of Google TV, everyone seemed to expect a response from Apple to counter their living room offensive.
I can't be the only one thinking it's only a matter of time until we see a completely revamped Apple TV based around the iOS and capable of tapping into the App Store. There are already apps available to bring the content, including video from a variety of sources (Netflix, YouTube, MLB, iTunes, etc). They would need to be modified to work at HD resolutions, but the iPad is already demonstrating that a larger interface only presents more opportunities. Of course, the TV lacks the touch interface, but there's no reason an iPhone, iPod or iPad couldn't serve that purpose.
If it were up to me I'd be mashing up an Apple TV with a Time Capsule to serve as a centralized media player/server and wireless backup device. It would backup any iDevice that's linked to it, and make media available via Home Sharing to both linked devices and other media players on the local network. You'd be able to browse the full shared library and add media for offline consumption. It's probably a few years off at least, but a guy can dream can't he?
As for Apple TV with iOS...maybe in time for the holidays?