Cell Phones & GPS
Reuters has an article on how personal navigation is becoming a cell phone feature. The Nokia N95 being one example.
It is not far off that your cellphone will tell you:
* Where you are
* Directions to get to anywhere
* The nearest cafe, bookstore, garage etc
* What specials are being offered within x metres of you
* Where all your friends are in relation to you
* How far away the bus or train is
The potential is almost unlimited.