The eye tracking required to get that level of accuracy is really high. Normally you need a bunch of camera like sensors that operate different to rolling/globa

The eye tracking required to get that level of accuracy is really high. Normally you need a bunch of camera like sensors that operate different to rolling/global shutter, plus a hefty calibration routine to get a good map of the eyeball. Even then it only really works looking dead ahead with your eye wide open. so for the moment, that stuff is firmly in the lab. So whats the real play? to replace phones with glasses that know you better than you know your self. To bake all that you see and do into <300 megs a day, and make it searchable in a way thats useful to you (not as in where was I at 22:04 on the 4th) as in "when did I last see x, what colour y did they say they liked?" but without having to ask that question. Imagine a really really good personal assistant, that could answer 99.5% of the boring questions asked you with authority. That is the level of AI they (and google and facebook) want