A lot of people overlook the addition of LTE. It'll make a difference. It's not just the screen.
That said, I don't think it quite matches the iPhone 4 upgrade. The retina + front facing camera + facetime + redesign was a pretty big change.
That said, I don't think it quite matches the iPhone 4 upgrade. The retina + front facing camera + facetime + redesign was a pretty big change.