The tech isn’t quite there yet but i was impressed with how ILM did the Carrie Fisher scenes in Rise of Skywalker and the deaged Indy in Dial of Destiny. Much more impressive than what they did in Rogue One or Mando.
But all the deepfaking and deaging still has that telltale fakeness to it. Like Harrison moved like an old man and sounded like an old man despite appearing young. Which gave it away.