> A paint-by-number filmmaking app. I want to be able to brainstorm an idea for a short film in the app, have the model create a detailed storyboard, and then I just need to use my phone to film each of the storyboarded shots. Kind of like training wheels for making movies.

There are at least half a dozen apps for that.[1][2]

There are other apps for creating the shots, too. Those are still not that great, but it's getting there. You could probably previz a whole movie right now.

[1] https://ltx.studio/platform/ai-storyboard-generator

[2] https://ezboard.ai/