You're offering a hypothetical where AI art can actually reproduce all of the capabilities of human art. Not just broad aesthetics, but emotion, intentionality, subtext, use of imagery, understanding of the human soul...

Is that ever going to be truly possible? Maybe if we create real, true AI. Something that's actually sentient.

But putting that aside, if we accept your premise, then sure, I doubt anyone would care. Then again, once an AI is able to create truly human art, what would be the difference between an AI and a human?

AI is fucking cool. The idea of living in a fully automated post scarcity future where advanced learning machines take away all of the need for manual or intellectual labour sounds amazing. But the goal should be to make a world where humans are freed from drudgery and given more time to create and appreciate art and beauty. Instead we're creating a world where humans toil away our lives while searching for brief sparks of joy in mass produced, corporate owned art that barely qualifies as art. Seems kind of fucked to me.

Instead of asking how far we can go in terms of automating away our ability to create beautiful things, shouldn't we be asking how far we can go in terms of automating away the barriers to people creating beautiful things?