You know, I didn't have to read any of this tread to know my answer-
While it may someday become possible to replicate the sounds and playback of a real player, it will never be quite the same as hearing music live. There are some things that may take many years to replicate perfectly- such as the many countless details of the sound of the performance, or they might be discovered tomorrow. I don't know, and I can't predict that kind of thing.
The one thing a computer will never be able to replicate is the thrill of watching performances live. It's nice to hear a recording of a good player, but I find that I get really excited when I go see
and hear live music by a good performer. No computer technology could replicate that. None. And don't tell me that it may be possible, because even if it happens, it will never be satisfactory.
Besides, concert-goers in both Classical music and rock and pop music and ALL types of music aren't just going to STOP GOING- There's that thrill of seeing that band/orchestra that you love to listen to that is indistinguishable by technology.
EDIT: Now that I have read a bit of the thread, it sounds to me that you guys are thinking up ideas of things that I would categorize under the movie War Games- computers that could store all kinds of different things, and could learn more of them! Can you say-
Would you like to play a game? 
