Some of the other changes to Apple's handset are things already bandied about in earlier discussions. For example, the financial paper expects the iPhone 5 to be equipped with a bigger 4 inch screen so that the phone can compete with the newer Android models which are sporting 4 inch to 4.3 inch displays. The bigger screen is supposed to stretch out all the way to the edge of the phone which will allow the handset to be the same size as the current model. Another big change involves the replacement the glass body seen on the current iPhone 4 with a less fragile metal chassis.
source: ChinaTimes (translated) via BGR