Open Sessame
The best electronic key is the one you always have with you
Though many remote applications already exist for the iPhone—including one that locks and unlocks a car—perhaps Apple could leverage the patent’s motion sensing to build an app with a consistent interface that is designed to communicate with a wide variety of lock devices, making the iPhone an out-of-the-box electronic key.
How cool would it be to stand in front of your house, iPhone in hand and wave a complex gesture to unlock your house!