When the original iPhone came along more than five years ago, it contained a set of sensors that opened up new possibilities: the proximity, ambient light and accelerometer sensors were all part of the package. The iPhone 3G added GPS, the iPhone 3GS threw in a magnetic compass, and a gyroscopic sensor debuted with the iPhone 4, enhancing the handset's perception of how it is moved, a boon for augmented-reality games and applications.
Some Android handsets include additional sensors, namely the barometer circuitry. But what if the iPhone packed in a bunch of other sensors to monitor the world around you in even greater detail?