Once the generation times get to real-time, I dunno what's going to happen. I follow the voice acting community a lot and this is a big existential threat level of worry in that community. But I also see some positives for the narrative voice field, but at the expense of actual actors. The latest sequel to a favorite audio book series has the professional narrator pronouncing different character names and town names…
My guess would be for voice actors to copyright their voices. I am not familiar with the voice generation ML but i guess for things like dramatic pauses a voice actor might still be needed. Also I'm guessing it should be fairly straightforward to detect such copyright violations. I would really like to see it implemented for heavy text driven rpgs. But overall yeah things look bad for voice actors in general
The threat is that, supposedly, pretty much all of the media companies that need Voice actors have a clause that allows them to use generative voice AI after the VA's death or if they're otherwise incapacitated to the point where they would be physically unable to get the voice actor back in the studio to record more lines. This is not outlandish for voice actors since they probably couldn't care less about their voice being used after they are dead, but it does mean we'll be hearing a lot more of it as more and more decade-long franchises use it to avoid hiring a good-enough impersonation or voice replacement once the old one dies.