If I buy an Apple TV, can I watch quicktime and mpeg files I have on my TV via Apple TV? Or does Apple TV just work with videos and stuff bought from iTunes? Can you stream other files that aren't in itunes?
I love the idea of Apple TV and am considering getting one but it's so confusing as to what it does.

I love the idea of Apple TV and am considering getting one but it's so confusing as to what it does.