It is definitely not perfect. It doesn't seen to track distortions of the skin on the face, such as around the mouth on the cheeks. It tracks eye blinks, but

It is definitely not perfect. It doesn't seen to track distortions of the skin on the face, such as around the mouth on the cheeks. It tracks eye blinks, but does it track pupil dilation? Doesn't seem like it could track forehead creases, though possibly. Do the avatar's eyebrows track the real eyebrows? No way to tell, but an important part of expression. I rarely see the eyes moving, maybe an artifact of being in a dark space with only one thing to look at? Pursing of the lips is not tracked. Tongue? I don't see shoulders moving. It's an impressive demo, yet as a repeated life experience it probably would start to feel artificial and uncanny. The video does discuss some of this. I get the impression some of it is prediction and some of it is tracking.