Last-minute rumors have pointed to the iPhone 4S being a worthwhile upgrade but not as dramatic as suggested by some. Along with the expected performance leaps of an A5 and eight-megapixel camera, TNW was told by a source it would have "improved optics," likely a reference to the f2.4 aperture lens that should lead to brighter, faster photos. The switch to using the GPS built into Qualcomm's dual-mode chipset should also lead to more accurate GPS.
