I don't usually post, but here's something I've been thinking about in regards to the bigger screen/not retina display argument.
Apple said that people hold their 3.5" phone about 12" away from their face and that 300 ppi is the magic number for pixels to be indistinguishable right? Then the iPad came around and it's at what? 260-something ppi? but their argument is that you're holding the iPad a further distance away because it's bigger.
Using that logic, wouldn't you hold a 4" screened phone slightly farther away than a 3.5" screened phone? So they could still get away with a ~290 ppi (or whatever the number is) by saying that most people hold it at 16" away from their face and at THAT distance, 290 is the magic number.
just a thought...bigger screen, still stays retina, everyone's happy. no?