At Apple's (NASDAQ:AAPL) recent Worldwide Developers Conference, CEO Tim Cook announced that iTunes has a whopping 575 million active accounts with credit and debit cards on file. This revelation, coupled with a new iOS 7 feature known as AirDrop, could indicate that Apple is getting closer to entering the mobile payments space. In the video below, Fool contributor Steve Heller explains why eBay's (NASDAQ:EBAY) PayPal unit could have the most to lose. 

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