Algorithmically generated music will replace the experimental, avant-garde genres first - noise, techno, black metal, etc. - and replace pop music last, long after classical has been fully outmoded. This will be entirely due to technical difficulty. Take from this what you will. You will live to see markets beyond your comprehension. Anything that can be measured can be traded. Everything is code, BTC is capitalism in the form of code = everything is capitalism. This is a good thing, because markets' consilience is the only truth.