iOS 6 is scalable to taller displays

In a discovery which almost guarantees a larger display on the iPhone, 9to5 Mac have found that when the iOS Simulator is tweaked to run at a resolution of 640 x 1136, iOS 6 displays five complete rows of icons, while iOS 5.1 displays only four.

As previously mentioned, apps are already expected to be slightly flexible vertically (most applications have scroll bars) and so increasing the resolution in one direction only is a very viable solution. From this evidence, I fully expect to see a taller display on the next generation device.