M.I.C. gadget has gotten their hands on a prototype screen for the new iPhone (The name is disputed, but rumors have pinned down both iPhone 4S and iPhone 5) that is larger and includes a new proximity sensor as well. When compared side-by-side, the physical size of the iPhone's faceplate has not changed, rather the screen size has been upped from 3.5" to (approximately) 4". (As a note of reference, the iPhone 4's screen is on the left in the picture, and the alleged prototype is on the right)
This new screen is supposedly going to be released on Apple's next iPhone, which is also supposed to be packing their new A5 processor.
Image credit [MIC Gadget]