The article inspired me to a couple of hours of research of the field. I feel it helps to see whats currently possible on a relatively low budget. This demo I came across uses an x sens bodysuit for capture (around $7000, plus yearly sub - prices aren't public) , and an iphone x for facial capture in realtime using ARKit programming.

To my amateur eyes, it looks superb, and better than many demos in terms of the sync/accuracy of the facial expression and speech.

https://www.youtube.com/watch?v=i51CizUXd7A

It's also quite charming and amusing. Here's a background article, explaining the approach.

https://uploadvr.com/iphone-xsens-performance-capture-bebylo...