The day will come where movie actors and celebs become CGI intellectual property, without unions, dressing rooms, personal problems off-set, etc. He's right to have this concern, it's happening now.
What's not to like, no ever-increasing salary demands, multiple scenes with the same "actors" can be filmed simultaneously, the celebrity never ages, and the non-celebrity human performers behind the scenes are easily replaceable cogs: there will be huge cost savings.
Compare this to an actor. People often decide to view or not view a movie based on the actors on it.
Since a lot of these new uses seem to be ‘fair use,’ it might require changes to IP law.