I had this idea a couple years back for an app that allows eg a parent to write a short story and have some sort of GAN generate the illustrations for it (hopefully with the ability to include images of a child that would be used to include them as a character in the story). Monetisation would come from charging to create a hardcover print of the book.

Some research at the time showed that the publicly available models just weren’t there so I was very excited to hear about DALL-E 2 a couple months back as the idea was suddenly far more feasible but it seems someone else will beat me to it long before I even get access to DALL-E 2