Why do you think so? Because of bad Pr Google and Amazon will not do it ? but will some other company do it ?
It could be done with "google glasses" like devices too, why do you think it will not happen? Because of existing laws or because there is no money for a big corporation to extract?
It could be done with "google glasses" like devices too, why do you think it will not happen? Because of existing laws or because there is no money for a big corporation to extract?