Those who watched clips of Cook's interview at the D11, tonight, provably have noticed that he took an iPhone out of his pocket. I honestly think that it could be an iPhone 5S. I mean, why wouldn't he use one? We've heard reports that the device could be in production next month so they probable have a few iPhone 5S out there. Of course, we've only had a look at the back of it but to me, there are great chances that it could be the next iPhone.