Music Composers Unite!
Sorry about going on and on, but I really want to make myself clear about this. It's an interesting and important question.
All of my comments are absolutely not denials of the benefits of music technology. I am myself enamored by music technology (of many different variates) at the moment.
Furthermore, I think it is an interesting thing in and of itself, that people can now create orchestral-sounding music completely independent of an orchestra. I DO NOT think that just because a composer doesn't have a traditional understanding of orchestration, that they cannot make good sounding music using modern sample libraries (even though I believe it helps).
I am stating an entirely different thing: Live music will survive independently of all this. Even considering the incredible complexity of the present day situation, thanks to the utterly befuddling state of Western Art Music and the recent advent of very decent and affordable mimicking technology, we can still be confident in this: People still like to watch a live performance. The evidence for that is all over the place. The onus is entirely on the composer to use that potential. But I think it's encouraging enough that we can confidently say instrumental groups will be here for a long time.
Oops, I was supposed to be finished. Okay, this time for sure :)