actually I was thinking about this the other day when noticing as kid wearing 3d glasses in the street.......our world could become a high tech emerald city, where signs and adverts come alive in 3d virtuality.... you just have to go around wearing the glasses
why have to juggle a smart phone in your hands?
wikipedia enries, google map images, etc could all be displayed
manipulation including level of detail and filters could be done
with vocal +/or sub-vocal commands ...
seoul, hong kong. etc have started along this road ...