There is a cool AI generated star trek short film titled unification where William Shatner and Leonard Nimoy are the AI actors. In this case I think it is pretty cool to be able to see both these actors again and hopefully one day we will see more then just a short film. I know for sure that William Shatner is fully on board with AI using his likness in movies. So AI playing actors does have some use here and hopefully more actors get on board with AI using there likeness as they get older.

I don't think AI will ever fully take film roles away from humans though, the way I see it AI is more or less an advanced form of cgi or animation so there is a lot of room for both.