it doesn't matter how much resolution you can pack into a 4" screen because my current iphone 5 is NOT USED as a web browser, image viewer, nor is it used for anything but making phone calls and texting these days. I have an ipad 4 for everything else multimedia.
It's so pathetic, the fonts are so small and the screen being so narrow and safari being too dumb to know how to resize fonts with overflowing formatting, it's quite sad this is my case.
I am looking forward to a 5" samsung Galaxy s4 because not only is the iPhone hardware meh at best, the iOS software is really not improving much at all. I use to feel the ecosystem was there but now competition has caught up.