Ok, I understand that it is a new feature that AppleTV can act as an Airtunes. This is new in that I can "push" music to AppleTV from the computer now, and before AppleTV could only "pull" music from my computer. I've seen several comments from people that this is a great new feature. I've never had an airport express so maybe I don't understand what all this means. Can someone explain to me how this is a big "new" feature since I could play all my music from AppleTV before? Be clear, this is not a gripe or whine, I'm trying to understand what this might mean for my use of the system.