Note the lack of stretching; it just increases the amount of space in between the rows of icons.

I'm kind of sold on the idea that apple is sold on the idea that old apps should work on new screen sizes either without any scaling, or with integer scaling (eg. 2x, 3x, etc). A taller display that keeps the 640 width would let them put old apps right in the new display, no scaling necessary. They could either fill the extra pixels with black, the dock, or widgets of some sort. Ideally all three with the user able to customize.

Anyone know the height in pixels of the iphone dock?