This can happen only if they solve the problem of facial expressions. The more realistic the characters look, the more we expect them to behave like humans. You probably noticed how weird animated human characters are, it's like something is off but you can't really tell what. I suppose it's the microexpressions that animators can't express.
When we start render digital "people" as actors, doesn't that mean that whoever is the pupeteer needs to be a good actor himself. This possibility poses some interesting questions. Can AI learn the script and, given some personality traits, behave like and actor? etc
I suspect that AI could help in this regard. Most precisely adversarial neural networks[1]. One network to improve realism, and the other to detect uncanniness.
When we start render digital "people" as actors, doesn't that mean that whoever is the pupeteer needs to be a good actor himself. This possibility poses some interesting questions. Can AI learn the script and, given some personality traits, behave like and actor? etc