Paypal launches a new way to pay for things easily and quickly using a check-process on your smartphone or tablet. Go to the restaurant, launch check in on your paypal app, it launches the restaurant's menu, you click on the app to order, the server comes with the food, you leave, you've already paid. This removes 66% of the waiters effort. Go to a cafe, check-in on paypal, they know you want a cappuccino, you get it quickly and leave, no cash, no confirmation, no anything. You park your car, check in on paypal, that's it, you're paying for your car park until you check-out, take the car and leave.
You can watch Paypal CEO, David Marcus's keynote at LeWeb 2012 here: