Uhh that is totally incorrect. If you want to stream videos / music to it then yeah, sure, you gotta have a computer to stream the video / music from, but if you want to buy or rent TV shows, movies and music from the iTunes store and watch them you can do so without an additional computer, the files are stored on the internal drive. No external computer required.
I set this up for my sisters kids. I bought them an ATV for Christmas and replaced the internal drive with a much larger one and filled it up with all the cartoons I had, Flintstones, Jetsons, Thundercats, Scooby Doo etc. Thousands of episodes. They have no computer at home and are technologically inept, yet I didn't even have to show them how to use it.
That is the one great thing about the ATV, any idiot can use it, hell even my mom can use it and she can barely figure out a microwave.![]()
So you don't need a computer as you stated, true. You could buy every single thing form the iTMS. But then what did you use to fill up the Harddrive? Uh, had to be another computer in there somewhere.