This technology could be really useful in a car. Tracking eyes either could make driving more safe by detecting if I am really aware and watching the traffic or

This technology could be really useful in a car. Tracking eyes either could make driving more safe by detecting if I am really aware and watching the traffic or traffic signs ( "you have overlooked the 30kmh sign") or maybe more informative, and combined with a HUD to give me information about the objects I am looking at ( fun facts about the car in front of me, or what PoI / Mountain I am looking at, etc )