I was hoping for an App Store to be introduced. Imagine the type of functionality this would enable on our TVs. You could have TV-optimized apps to check the weather, traffic, sports scores, show times, or stream video from other sources like Vimeo or Hulu. To get around watching videos you've downloaded elsewhere, there might be an Air Video like app which transcodes videos on the fly for viewing non-supported files.
This could also be Apple's trojan horse into the console market. There are already thousands of games available on the iPhone and iPad. It wouldn't be too hard to port many of them over to this platform since they're all running iOS. Perhaps you can use your existing iPod touches/iPhones as input devices. There's so much potential without even looking at the TV-content side of the business.
I understand that the node community is still very young but hopefully they'll start consolidating around some of the core libraries/frameworks pretty soon. For example, I haven't seen a consensus for the best testing or packaging libraries.