Apps for new iPhone 5 — what to expect?
As we all know from previous leaks iPhone 5 will have different aspect ratio from previous iPhone versions. What this will do to the iPhone apps? iPhone screens have always had a 640-by-960-pixel resolution and a 3:2 aspect ratio. Indications are the iPhone 5 will have a 640-by-1136 resolution, which is close to a 16:9 ratio.
Apps that use standard controls will benefit and use the extra space to display more information, static widgets or second row of buttons, we have similar dual-row context menu UI element on Android devices. The controls themselves will remain the same size since they are defined by finger touch requirements and not the screen resolution or aspect ratio. Games which take the full screen will have to do something with space when run on an iPhone 5 at both top/bottom in portrait mode and left/right in landscape. Notorious Angry Birds will definitely do great on wider screen and many action games will win a lot from using left/right space for thumb controls