Artists are going to lose this one. Much of the training data is pictures of the real world. There's plenty of out-of-copyright human made art to train on for style. Legal problems come from trying to imitate popular culture, and that's a trademark and trade dress issue, not copyright. Disney will litigate that as needed.

Expect something soon where you put in a book and get out a graphic novel. Then, put in a screenplay and get out a storyboard. Then, put in a storyboard and get a movie.