People are obsessing over one-handed use. You can't accurately zoom in on a picture (on iPhone) when holding it in one hand... It requires the pinch gesture, which is nearly impossible to achieve with the same hand you're holding the phone with.
So, for the benefits a bigger display brings, without loss of quality, I'm all for it.
After all, scrolling through music, contacts, dialling phone numbers, etc can be done on a large screen with one hand, so long as the OS scales appropriately. Can't reach the back button? There's a gesture for that.
If you're editing photos or video, working in iWork or anything like that, the chances are you're using two hands anyway.
All this discussion for a .7" increase in screen size...
People are obsessing with size because they want to be able to comfortable hold the phone.
I don't use my phone for pinching and zooming I have an iPad for that. The phone IMHO must be a phone first and the others next.