Never thought the 5s would have a bigger screen than the original iPhone 5. If Apple go for another screen size increase on their iPhones it would be with the iPhone 6, or even 7, as opposed to the 'S' versions. But I don't know if they will even go down that road, as where do you stop? The Samsung Galaxy S4 has a big screen, but to me it is too big. Much bigger and you are in to small tablet territory. A phone should still be able to sit comfortably in your hand. So bigger screens on phones every year is not what I want to see.