There's been a new media for music every ten years for the past fifty or so. Records, cassette's, CD's, mp3's, streaming. I've been doing the thought exercise with some of my more creative and/or musically oriented friends recently to try to determine what comes next (if anything).
The only conclusion we're able to come to is some kind of procedurally-generated music that is more specifically catered to each listener. I'm not surprised this wave is starting to break and it's a great time for artists and legal teams to figure out how to work with this technology if there's any possible way to do so.