The gum just doesn't work for me. A black and white mega popular white female jazz singer doesn't really make sense. Maybe a Judy Garland type singer would work but she is singing a style that I don't think makes sense. Like someone making what they think jazz vocals should sound like but they don't really listen to much jazz. Billie Holiday wasn't even that popular.
Just like the black and white part doesn't work for me because you can tell it is just the same color clips but desaturated. While real black and white would be on film and look shot on film.
I think the AI stuff is actually pretty good but the director/human creativity here is actually what is not that good. The sound design and music are pretty bad.
I am waiting to see what Aronofsky can do with these tools since the studios won't let him set 30 million dollars on fire again like with The Fountain.