The only parts of movies or TV that this will be useful for is non-character-driven filler that doesn't move the plot along. It will be great for things like action scenes and car chases, or staring wistfully at the ocean. But they still need actors and a story, and to tie those together seamlessly with whatever is generated. We're very far away from doing that in a way that will look or feel good.
Special effects are nothing new. But we all know special effects don't make a good movie.