iPad 3 to iPad 4 upgrades: -New processor (A6X chip) -New wireless (Expanded LTE and faster Wi-Fi) -New camera (FaceTime HD) -New connector (Lightning) The iPad 4 was really a silent update so instead of calling it the new iPad, Apple called it the iPad (4th generation). People think that in order for it to be a whole number, it has to be redesigned (ex. iPhone 4, iPad 2). But as seen in the iPad 3 to iPad 4, they were both the same design with some upgrades and it was enough for Apple to call it the iPad 4. iPhone 5 to iPhone 5S upgrades: -New processor (A6X/A7 chip) -New wireless (LTE world phone and 802.11 ac Wi-Fi) -New camera (13MP iSight camera and new optics) -Some new feature like Fingerprint Sensor, iOS 7, etc. So based on the iPad 3 to iPad 4 model, doesn't the iPhone 5S or at least its rumored specs make it ok for it to be called the iPhone 6 from the iPhone 5? I could care less about the name/number, but its interesting to see what Apple did with the iPad 3/4.