Well it's a different audience, isn't it, and you'll often find folk either into classical or pop/rock with some in the overlap group. I really enjoyed going to the Proms!
1 orchestra can have more musos than 10 cover bands. And let's not try to compare musicianship 'cos it's not going to come out too well for the average pub rocker is it?
Nope, what I'm saying is pretty much in line with what @Ben Jamin said - live performance is, for me, where it's going to be at.
Btw Elvis sang some great songs, the point is no one remembers who wrote them, they remember him though. And it wasn't just about looks, the man could sing and he could also perform.