Already AI is being used for comic book backgrounds. It's just a matter of time before all of this becomes commonplace.
When you look at AI and what it does, it is no different to what humans do. We are trained on a model (experiences and other minds), and we make derivative decisions based on the model. If you can do this in software and take advantage of light speed learning then of course all we can do will be done by AI faster and better. In time humans and AI will be the same, AI will design all the tools and tech to make this possible. It's the only natural conclusion to humanities' ultimate goals.