Ah, but computer libraries grow in sophistication every day. Moore's law is still in effect. And code never forgets its lines, or how to act. It never gets sick, or loses its looks, or dies. Once it's debugged, it never throws temper tantrums and storms off the set, leaving a whole production crew eating up money and time.
The handwriting is on the wall.
Maybe. But ... the Uncanny Valley effect is pretty strong (I find Masahiro Mori's explanation of it a little weak, bordering on pseudoscience, but there's no doubt that there is human revulsion at the not-quite-human movements of these characters). I found that woman's face horrifying well before the "reveal."
Maybe programmers can get past that. And maybe they can animate virtual actors eventually with acceptable moves.
But ... then what? They'll have at best a library of approximations of the current fashions in how actors move and pause and act. And if you think that doesn't change, just go look at shows from 20 years ago, or 40 or 60. They won't have any leeway for human genius or creativity or inspiration, just the same moves over and over.
Also -- and this is disgraceful -- it's going to be a very long time before the tech is cheaper than human actors, given how little actors are paid.