For anyone pondering such questions, I would recommend reading "The Past, Present, and Future of AI Art" - https://thegradient.pub/the-past-present-and-future-of-ai-ar...
This is really already the case, actually. Most artworks have “value” because they have a compelling narrative, not because they look pretty. So I think we can expect future artists to really emphasize their background, life story, process of making the art, etc. All things that cannot be done by a machine.
When you have a digital display of pixels, if you randomly color pixels at 24 fps then you will eventually display every movie that can be or will ever be made, powerset notwithstanding. This can also be tied to digital audio.
In short, while mind-blowingly large, the space of display through digital means is finite.
I think an AI infused future is going to become increasingly more absurd and surreal, it will lead to a kind of creative and cultural nihilism, if that's the right term.
Like the value of originality will become meaningless.