I remember the days when a 3.5 inch screen was the perfect size and anything larger was doomed to fail. It was the perfect size to fit in anyones pocket, if you wanted something bigger then buy an iPad and shut up. If Apple always does everything right and everyone else always does everything wrong then why is Apple following others when it comes to screen size? What changed?
Did our pocket's become larger? I hope if Apple decides to build a 6" iPhone they buy a company that sells man purses. Put the phone in an otterbox or life proof case you could use is as a floatation device. Sorry have to call bullshit on Apple building a phone larger than the Samsung Galaxy Note 3.
I have a Note 3, and it fits my jean pockets fine. It does take up the whole pocket, and at work (construction), I have to turn my phone a certain way in my pocket as to not put it in a bind when I'm in certain positions or wearing a harness, but it's no big deal.
Honestly, if Apple comes out with just a 5" phone, they'd make a lot of new customers. It doesn't have to be 6". It just has to be bigger than the dinky one they have. Once you go bigger, you'll ask yourself how you ever dealt with that small of a screen. I could never go back to my iPhone, just because of the screen size limitations. Now, if they launch a bigger iPhone, I'll take a hard look at it.