iPhone 5 news latest talks about the iPhone 5 display size
If Apple issues different 3.5-inch screen, then this one is simple: it will continue the same 960640 resolution. Trying to increase the resolution of the existing Retina Display would be too much and not exactly price efficient.
If the screen gets blown up, though, it will be interesting to witness what Apple does, A bigger screen for Apple would be very interesting Steve Jobs was in the public for not missing a bigger display as he believed it looked to much of Android. It would be easier on developers to hold the same 960640 resolution, but this would depress the pixel density of the iPhone Four and iPhone 4S. There havent been numerous rumors about this, so lets say that Apple pushes up the resolution up a little bit, to 1080720. At 4 in, that would offer it a pixel denseness of 325, only slightly lower than the 330 of the iPhone 4/4S, plus it would hold the aspect ratio that the iPhone has always used.
This one is easy: if the iPhone 5 isnt slender than the iPhone 4/4S. It would be unpleasant to think that Apple does not decrease the thickness as a lot of Android cells are already a lot thinner than the iPhone FourS. High-end Android devices like the Android Razr and the Galaxy Nexus are already skinnier than the iPhone. I can not image the organization that made the MacBook Air passing another gen without adding a amazingly skinny iPhone.
Since the concern of having a solid picture for our fantasy concept, lets tell that it will be seven mm dense, a hair thinner than the original Droid Razr.