Near-field Communication is, supposedly, the next big thing in mobile computing. According to analysts, and Google, digital wallets are going to change the game. A bunch of high-end Android phones are already equipped the technology. Now it seems Apple may be joining the fray. At WWDC, Apple introduced what may be its foray into digital payments: Passbook. Sure, it only allows you to store coupons and gift cards, but many feel that's just the beginning. If that's not enough, last month, 9 to 5 Mac reported on two iPhone 5 prototypes that hinted at containing NFC chips.