I suspect that basing synthesized actors based on real actors is a transitional thing. Studios would rather create actors. So they own the actor outright, and not pay royalties.
https://www.imdb.com/title/tt1821641/?ref_=nm_flmg_act_16
Good book, not so great movie.
And no actors guilds, unions, make-up artist time, dealing with actors needs, multiple takes and expensive re-shoots that is on developers now. Movie studios won't need to be in a big city any more either. Developers can work from home if their internet is fast enough.