You'll be very impressed, then. When it's time to pay, you hold up the iPhone to the NFC reader (or whatever you call it) and click. That's it. Payment goes through or doesn't depending on whether you pass the authentication requirements. It's awesome, but it needs iPhone6 or Watch. And no one knows yet if Watch will work if you have an older iPhone. Hope it does, at least for 5s since it has TouchID, but I'm not too optimistic.