However there is such a large body of work already, all the derivative stuff can be made effortlessly. What would happen for instance if you told the AI of 2050 "I want to mix the Brothers Karazamov with the Odyssey, set on Mars after the apocalypse?" I just tried with Sonnet and its not too bad. Maybe a large enough basis of stories has already been told that most AI scripts will feel novel enough to be interesting, even if they are just interpolations in the latent narrative space humans have constructed.
Actors will be wholly unnecessary. A human director will prompt an AI to show more or less of a particular emotion or reaction. Actors are just instruments.
The three most interesting transformations AI will bring are:
1. Allowing a single human "director" to rapidly iterate on script, scenery, characters, edits, etc. One person will be able to prompt their way through a movie for the price of electricity.
2. Movies will become interactive. "Show me this movie but with more romantic tension / with a happy ending / Walt loves Jesse"
3. Holodecks will allow young people to safely experience a much broader range of events and allow them to grow their souls faster, meaning they can make better movies. Modern movies suck because life is too predictable and tech-focused for good writers to emerge. We won't ever put ourselves in real danger, but what if your senior year of high school was to live through the French Revolution in a holodeck? It would change you forever.