I, like millions of others, have had little understanding of AppleTV, but am intrigued by the Apple Event today. If I understand it correctly, I buy AppleTV for $99, then for .99 I can rent and stream (HD when available) TV shows and movies. How is this different than just using my iPad app and the AV cable to play it on my plasma? Also, do I have to watch the movie as it is streaming, or am I able to play it at a later time? Thank you for your time.