I'm surprised how downbeat some people are sounding about live music on this thread. I've heard that for the first time since recorded music was widely available, artists are making comparatively more money through live gigs than ever before.
I'm guessing how popular dance and electronic music is atm must've had an impact on the amount of opportunities for traditional live musicians, but there's definitely plenty of healthy new music scenes around.
On a side note, there are plenty of people making a career out of music without leaving their bedroom now. (See youtube/bandcamp/soundcloud.) I also don't think this is having a negative effect on people's interest in live music either. If anything, the opposite.
As a 23 year old, I can 100% tell you that young people are interested in live music. With all due respect, if you're not seeing them at shows, it's not because they're not going to shows, it's because they're not going to the same ones as you.