Very interesting topic @cryptogee and I've also gone through a similar thinking process after seeing some pretty amazing robotic art.
However, until I've seen art created by a non-human that not only moves me, inspires me, but also plants the seed for growth in my consciousness, the kind of growth that takes place over months and leads to a deeper understanding of the human condition... until I experience that I'll still maintain that the creative human experience is uniquely powerful, moving, and important to other humans.
Moves you... yes, I think that is the unspoken, ungraspable thing, qualia, that may be hard to recreate on a human level. What's interesting is if these things start to move you in a new and different way, if somehow the AI art of tomorrow reflects their hopes, dreams, despair, joy and every other emotion we see conveyed via art.
Did you check out the link to the AI art above? I put it under further reading, it's very interesting.
Cg