How? At best it can take pictures of part of your face. And usually there's a screen inside that headset. Don't you have the exact same problem of needing a camera to be in the middle of the screen? But now it's even worse because the other person's eyes could be anywhere on the screen as you move your head.

Edit: Oh, you have a link now. So it's going to render a fake head based on eye tracking? You can do that without VR!