It'll come quickly for audio books. I've been working on a locally hosted, fully containerized web application to narrate my sci-fi novel using a full cast of characters and a few distinct narrators:
* https://i.ibb.co/ccqKZ71L/keenlore.png
I would pay a few actors (mostly Star Trek TNG cast) money for a license to their voice.
I don't know how the next generation of beloved actors comes about and how we don't descend into a pit of neverending photocopies of things people once loved in the 1990s/2000s.
This is very interesting! Imagine Silly Tavern, with dialog tagging and coloring of some sort, auto-generated talking heads. Almost a game engine.