We're already starting to see this in video games. An upcoming shooter is using AI text to speech for the in game "announcers" and voice actors are not happy.
https://www.pcgamer.com/the-finals-uses-ai-text-to-speech-be...
It lets them add voice lines to the game almost immediately at very little cost. There's some debate over how good the results are but personally I wouldn't have been able to tell it was AI generated if I didn't know ahead of time (here's the game's trailer for reference).