"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Mobile Payment System 'Transaction' - an iPhone-based eWallet
Apple's patent is directed to various techniques for conducting peer-to-peer financial exchanges using a handheld, portable electronic device - which for the sake of simplicity is represented throughout several transaction-based patents - as the iPhone.
The iPhone may integrate several functionalities for performing peer-to-peer transactions, including the storing information representation a user's payment accounts and crediting accounts, acquiring and sending payment information, and obtaining payment authorization.
Apple even names the app "Transaction" in the patent application and details how it might be used. This flowchart shows how one might pay for a bill at a restaurant using the application:
The patent applications for this system were originally filed in late 2008.