Comment I agree - don't copy voices (Score 1) 33
Personally, I'd expand a bit. Two games I've played recently are No Man's Sky, an open world SciFi survival craft game, and "Still Wakes the Deep", which is more a horror themed action visual novel.
Still Wakes the Deep is completely voiced, but utterly, absolutely, on the rails - there's always only one way forward. Thus, replayability factor is lacking.
No Man's Sky isn't voiced at all, but would likely make a lot of people cringe because of a large but still limited number of dialogues. Plus, well, probably whatever mechanic they use for the translation device, because you don't start knowing the alien languages. NMS has the "hundreds" of characters.
So I could see AI being used to not only create "hundreds" of different voices for all the characters, but to write different dialogue for them, even if it is variances on common themes.
Go from basically 100 characters with maybe different appearances to unlimited characters with like 100 archetypes.