What is the iPhone 5 going to have that the iPhone 4 does not?

Soon after the iPhone 4 was released in June 2010, Apple fans began wondering about the iPhone 5. In October 2011 Apple announced and released the next version of the popular smartphone, the iPhone 4S.

The main difference between the iPhone 4 and 4S is the addition of Siri, a voice-activated personal assistant. The 4S also boasts a Dual-core A5 chip, as opposed to the iPhone 4's A4 chip. The camera on the 4S has 8 megapixels compared to the 5 megapixel camera in the iPhone 4.