Someone still has to come up with new art styles for the machine to mix.
"Going the way of the dodo..."
Alternatively, equip a human with an EEG headset, let them look at images, and take the rating from the output of the scanner.
So it's going to be perfect for modern art? :D
Recurse.
Use whatever language generator deemed appropriate* to assign proper titles for the newly-evolved art movement.
*this may be delegated to a meat-computer, in pity.