When Apple announced the iPhone 4S, one of the few hardware aspects to change was the increase in the number of megapixels the in-built camera packs. By taking the iPhone 4's 5 megapixel shooter, and upping it to the 8 megapixel part in the iPhone 4S, Apple not only managed to improve the quality of photographs the camera takes, but also to bump the video resolution from 720p to 1080p.
