The One Product That Makes Apple a Trillion-Dollar Company Overnight

Apple will become a trillion-dollar company based not on iPads and Apple TV, but payments.
Imagine taking out your iPhone and instead of buying Angry Birds you bought the latest Groupon.
Or one-click bought the latest object d'art at OneKingsLane or Fab on your iPad seconds after downloading and launching their app.
Or you took out the awesome Hotel Tonight and without ever having signed up for the service you booked a room -- and paid for it without typing in your credit card number.
That's coming.