To explain the system briefly: it projects information on your glasses (normal or sunglasses). The goal here is to project everyday use data like train schedules or the arrival of an email or whatever else you might want. We can imagine a system that incorporates a database with information about the city and that gives information about the area where you are situated, possible hooked up to a GPS system and a system that detects what the eye is looking at.
We can imagine a system where you get to play real life Quake. Wahay! Imagine THAT in the playground/workplace.