I find it easy to imagine some disabled, or disfigured, otherwise blocked-from-stardom person using tech like this to transform themselves and be able to express their truth without being unfairly judged by the physical form they were born into.
But that's not what we're talking about, is it? Be honest.
If you want to impress me, well, I'm a techie nerd. Make a furry celebrity actress, that's the expression of a person. Like a Hollywood-grade implementation of a VTuber. Let 'em be driven by a person that I can get to know and recognize. In this day and age I'm not wedded to forcing everybody to be trapped in the form they're born in, still less so in art.
But this is NOT what we're talking about. You're going to have an AI by committee, drawn from a pandering mass of popular reactions, producing problems not unlike modern-day movies that try so hard to pander to the audience at any given moment that there's no weight to them and no point to any of it.
Here's hoping we also get the other thing. Sort of 'T-pain autotune turned into a style' but for acting. And again, I'm down with it if it's letting artists execute on realities they are otherwise completely unable to reach. But that's not what we're going to get, is it?