My argument goes as follows: the following points are technologically feasible in the near future:
- each car, bus, train, truck, …, object is tracked in real-time
- each person is tracked (location, activity, …, food intake, eye-gaze) in real-time
- environmental conditions are continuously sensed - globally and locally sensed
- with have a complete (3D) model of our world (e.g. buildings, street surface, …)
Considering this it becomes very clear that in medium term there is a great potential in having control over the access terminal to the virtual world, e.g. a phone... just thing how rich your profile in facebook/xing/linkedin can be if it takes all the information you implicitly generate on the phone into account.