Early computer generated visual effects were obvious and bad, they had to be used sparingly to avoid alienating the audience.
Now, they're on basically every frame of basically every film.
Now, they're on basically every frame of basically every film.
I expect the use of AI will be similarly varied in the beginning. It could be used just for background details. It could be used in a hybrid fashion where artists design the characters with reference poses, a storyboard, and maybe even some keyframes, and the AI fills in the gaps. And of course some studios will just be sloppy and use AI to generate larger pieces without fixing the glitches and inconsistencies.
People are sometimes dismissive of AI based on the "fire and forget" prompting modes but don't consider AI-assisted tools or human-assisted AI like inpainting.