As we know the new iPhone 5 is launched with iOS 6 with new resolution i.e., 640 x 1136 pixels (width x height). Grab the free UI Kit from here: http://www.teehanlax.com/downloads/ios-6-gui-psd-iphone-5/
Most of the designers have a question that how to design for iOS 6, or what will be the new changes in designing with the launch of new iPhone 5!
As a matter of fact, Apple haven't experimented with the resolutions but the only change is with "Height". So, we don't have to panic about the sizes & resolutions. Designers can design with the same old proportions i.e. 640 x 960 (Retina). Basically, the height of the screen is increased that means user can see more content without scroll :)