As someone who is incredibly terrible at graphic design but knows what they like this could be a game changer as iterations of this technology progress. I can imagine going further than images and having AI/ML generate full HTML layouts in this iterative way where you start to define your vision for a website or app even and it spits out ideas/concepts that you can "lock" parts of it you like and let it regenerate the rest.
I'm not downplaying designers role at all, I'd still go to one of them for the final design but to be able to wireframe using words/phrases and take a good idea of what I want would be amazing, especially for freelance/side-projects.