Yeah, this is cool technology, but it will cause a scale back in voice over work. I can very feasibly see a situation where they just credit maybe five people for ALL the incidental work, because they'll be the "input," people and tasked with reading fucking tomes of side quest dialogue, while the leading roles will still be taken by well known names.
Basically, people will still have jobs, as long as they're Nolan North, Troy Baker and Laura Bailey.