Im afraid that AI will overwhelm us with perfect amazing music (and other creations) that we will come to a familiar situation that Alan Watts describes : "And you would, naturally as you began on this adventure of dreams, you would fulfill all your wishes. You would have every kind of pleasure you could conceive."

And then in this world overwhelmed with perfection we will fall back to that untraceable aspect of human creation that keeps us in awe. Of course we will be much more comfortable in that advanced world in a sense of fulfilled basic needs, but self actualisation (from the pyramid of needs) i guess will never be achieved by AI :)