Are you kidding me? iPhone users have no idea how small the screen really is. 4.8" would be great. But anymore more is much too big IMO.
But knowing Apple...
iPhone 5s with a 4.8" now it's even more taller. You get an extra row of icons!
Apple you need to think it both X and Y axis, not just Y.
Yup.
Let me tell you I used one of the very first big screen ANdriod phones (HTC sensation XL- 4.7 inch) and having a big phone is basically impractical. I was basically the slave to the phone cuz I could not do anything one-handedly and whenever I went out I could not have fun because I was too focussed on trying to fit the phone into my pocket. But I bet you know that already.