Walk into Starbucks/McDonalds/etc, pull out your iPhone, tap your order onto the screen, and wait for the notification that your order is ready for pickup.
Apple has a patent pending for a new wireless system which allows consumers to place their order from a wireless device, such as your iPhone, and receive a notification on the device when the order is ready for pickup.
The system would be integrated with some sort of payment system as well, word on that isn't clear. Perhaps some sort of online wallet-type application to hold your billing info, perhaps directly into iTunes. No word yet on when this would be rolled out, but its an interesting future. End goal of all this "innovation"? Never have to talk to anyone ever again... sigh.