Then what else can you expect new for a mobile phone? Honestly if it's not at the peak, then the iPhone 6 should have been more outstanding and more functions, but the transition from 5s to 6 was basically a facelift, larger screen and better camera, the same technology can also be applied to 5s if apple were willing to do so. Even for iPhone 7 you'll not see much technology advance, the functions they'll add to iPhone 7 will still be limited, it won't be like iPhone 3gs to iPhone 4, which has much more advanced mobile phone technologies.