Larger screens are popular PRECISELY because you can fit more information and content there. Not because of larger pixels.
This would be so useless.
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Maybe for some folks, but large screens are popular because they are easier to read because everything is scaled up.
Also, movies and photos look great on them and the keyboard keys are bigger (no need to file your finger tips)
We don't want larger screens so Apple can cram more stuff on them.
I've got a Note II and would buy a large iPhone in a flash if Apple did it. Have even written to Apple about that. I bet I'm not the only one.
Steve once famously said, "Who'd want a 7-inch iPad? You'd have to file your fingers down to use it."
Incredibly no one called him out on the fact that the iPhone screen was half that size which therefore implies you'd need to file your fingers down a LOT to use its tiny keyboard.
PS Don't even begin to tell me that iPhones allow scaling the text up for accessibility. It doesn't work for all text, mainly just Apple things like email and SMS. You end up with a disjointed ugly experience.
Bring on the iPhone Plus! I can't wait.