For musicians, its great to perform live for people but having to tour and go from gig to gig, lugging equipment around, and most of the time only being paid beer money and travel expenses.
Being able to perform for an audience but not having to leave your doorstep saves you both time and money. You can reach more people worldwide than you can in a small pub holding fifty to a hundred.
I understand people love turntable.fm but the labels have pretty much killed innovation by the licensing so to me it isn't a surprising that streaming companies are having problems.
Maybe the new turntable.fm can be the Twitch.TV of the live music world. Who knows but anything is possible!