"On your return, naturally distracted by your brilliant purchase, you forgot where you parked your car. So you whip out your iPhone, which immediately connects to the parking garage's wireless system and pinpoints your car. While approaching, the phone's Bluetooth links up to the car and confirms the identity of the phone and the car. You look for your key, only to realize that you left it in plain sight sitting on your seat... but no problem as you use your iPhone to unlock your car. Once in the driver's seat, you notice that someone has changed your seating position. Instead of trying to get comfortable again, you recall your profile from your iPhone, which then moves the driver's seat and the mirrors to the optimum position for you. Lastly, you use your iPhone to start your car, while also turning on the radio to your favorite station, opening the sunroof, and setting your inbuilt GPS for home..."
... after 5 minutes of driving you notice that was not your car.