So this is a nifty extra on the soon-to-be-released Samsung Galaxy S5. If you have a Commonwealth Bank or Westpac account, you can use the phone's built-in NFC for fast Tap 'N Pay payments.
Campbell over at Gizmodo reports that the option requires you to install an app from the relevant bank, then you're good to go. Infinitely preferable to the fiddly case-adding variants we've seen in the past.
If you're contemplating the S5, check out our Planhacker guide to all the contracts available.