[aab0]

You can definitely see where this is going. My first thought was the same: 'we need eyetracking for foveated rendering anyway, so we can get realistic eyes for free', and if you can do that, you can track the eyebrows and muscles around the eye (doesn't need great fidelity), and I wonder if that gets you all the way to the rest of the face as well? Can you smile/frown without it tugging on the parts closer to the eyes which the future headsets can observe?