No more car keys!
.
Bob arrives at the airport and tries to find the car rental parking area. He goes to the information display board where a personal, instantaneous welcome message providesh all necessary information to find his car. He goes to the car park, opens the door, starts the engine and leaves. At no point has Bob received a car key from anyone, nor been asked to fill a form.
How does this work?
By touching the door handle of the car, Bob starts an eGo pairing between the eGo compliant device (the car) and his eGo. Then a logical channel of communication is available to transfer the rental contract from Bob's eGo and the car.