Folk music. Music played by folks, for no other reason than they enjoy doing it (the genre doesn't matter in this definition).
People still do seem to go to big concerts, the way they've been going to spectacle movies such as "Avatar"... to be in a big place with a lot of subwoofers and some fairly simple plot.
But in a nutshell, do music because you enjoy it. Find places to play that can make that happen, and don't expect any real compensation.