https://www.cnet.com/news/tobii-pros-new-eye-tracking-analytics-for-vr-learns-from-your-gaze/

The next generation of VR headsets will most likely all have eye tracking built in. And in the meantime, eye-tracking technology company Tobii is developing ways to analyze where our eyes go in VR, and learn from it.

I tried Tobii's eye-tracking tech in an HTC Vive VR headset a few months ago, and it was astonishingly good. But what's amazing and unsettling about where eye tracking is going is how applications could start to use it.