I don't think AI could get to the point of creating art. I think it could measure output against feedback indicating pleasure in response to previous works, and probably make variations thereof. The key aspect of using that to influence something new is what makes creativity unquantifiable. The closest thing, I think, would be the equivalent of 1000 monkeys on 1000 typwriters, etc etc, except at a faster speed. Anything that would be truly great would be pretty much accidental.
Genuine artistic creativity is something meatware handles really well. AI is only there to help. Think about the part photoshop plays in the hands of an artist, at present. It enables them to do totally different kinds of stuff, to express themselves in ways enabled by the tech. So we're due to be entering VR and AR space in the near future. Expression may include detailed environments which the user will virtually inhabit.
At present we need to teams of people to create these environments, to model the geometric forms and textures. Software is applied to things like physics and flocking/crowd behaviour but eventually we'll have a bunch of AI agents that can deal with the nuts and bolts of modelling. You ask for a flock of starlings and the machine does a quick google image search, models the birds then checks youtube for videos of them in flight.
Like with photoshop, these AI assistants carry out human instructions and perform algorithmic operations on data. Like with photoshop, the software doesn't resent being told what to do.