It'd be better to do it wirelessly, which is possible because U-Verse is IP based. There are tons of great features that are supposedly being worked on for the iPhone and U-Verse in AT&T Labs. Not sure if/when we will actually see them.
Here is a cool article about it, although it's a year old:
http://gizmodo.com/5022574/the-future-of-tv-according-to-att