I think music will always have hits and superstars, whether the gatekeeper is radio or internet. What we call "viral" today will be upgraded to how we think of "hit" today.
Overall though, I'm more excited about the "middle class" of musicians the new era of music industry can support. I personally think maintaining a profitable and real relationship with your fans will require a lot less overhead in the future. And, they can go direct to fan, which is beneficial for independent artists, imo.