Updated Feb, 10th 2013
When you take your car, you know where you are going almost every time. With smart-phones, everyone could afford a good GPS working on the cloud. However those GPS don't work together. Why don't create a system which analyze where everyone connected go and create new paths depending of traffic flows?
Make our smart-phones GPS decide which are the better paths to our destination depending of where the rest of the people connected to the same app go.