I don't think that's really "new". That's combining two existing styles that the LLM has seen in its training data, and the creative idea to combine those style

I don't think that's really "new". That's combining two existing styles that the LLM has seen in its training data, and the creative idea to combine those styles has been supplied by the operating human. It's phenomenally impressive, and may be a stepping stone to models that can come up with new ideas, but I don't think we're there yet. LLMs seem to be able to capture the idea of Shakespeare and Bowie's styles, and intuit a combination of the two, but when I start asking it questions about what it thinks about the process I don't get the impression of any understanding. It can magic up text from prompts but it doesn't understand what it's doing.