The Carrie Fisher example is quite amazing. It somehow manages to remove all the plasticity of the original.
You sure? Didn't they just run the deepfake algorithm (trained on photos of young Carrie) on the CGI scene? So it went from "Hollywood CGI actress" to "allegedly improved deepfake actress"...
They basically just ran the algorithm on the existing movie scene.
The result is a fairly plausible Carrie Fisher, made more plausible (to my eyes) with deepfake. Obviously it helps that someone already made the original fake Carrie Fisher, because deepfake had to do less work, but it highlights the fact that deepfake could be useful in the industry: Make a plausible CGI version, and then improve it with deepfake.