Think about screen writers that have an idea of a movie that no one agrees to produce and now with ai engines it comes to life even as a trailer / short movie that people consume.

Heck, AI might even help them refine the script or allow unheard of cinematography visuals

The business model of ads and film making is definitely going to change to allow more creativity but it does bring up issues like rights and distribution

Even presentations will probably be more entertaining to watch ;)