There is a 0% chance I’d pay the price this would have been a couple years ago. I can’t even fathom how much this quality of art would cost, probably tens of thousands of dollars.
Before the DM would just hunt and peck around for online images that sorta matched what he was going for, mostly rudimentary pencil drawings with some color fills.
To me the dream is saying “Elmo is king of a Mad Max style castle, please write a story and generate art assets” and in front of you on the tabletop your Apple Vision Pro tiles out a whole dungeon, does voices, you can go in and inspect and interrogate the pieces and make tweaks to get it just right.
I don't think, in all my years of role playing, I've _ever_ seen an image of one of the NPCs in our stories; at least outside of the rare store-bought adventures. Or, at least that I can recall, an image of _anything_ in our campaigns. Everything was verbally described.
I wasn't even aware people generated pictures for home-grown adventures/campaigns.
Art is nice. Customized art is nicer. Also, it's interesting that (as you note) it's far from universal. My group would likely have enjoyed using AI art for our campaigns, but my girlfriend's groups have completely rejected it.