Here at Polaris we don't usually get too excited about fashion, but this ring might be an exception. Now available for preorder, Visa's NFC ring employs similar technology to the Apple Watch to make credit card payments as easy as a flick of the wrist. And since it can also unlock your front door and send photos to your friends, it might actually be a the kind of wearable technology that the public is ready to embrace. Visa unveiled the ring last month at the Olympics in Rio, where athletes who used the ring were said to appreciate its portability and water resistance. Would you wear one?