With the iPhone 5s, Apple has introduced the first, functional, mainstream fingerprint ID sensor - Touch ID. With it, the touch of your finger activates a scanner that reads the living, sub-dermal layer for ridges, arches, and whorls, transfers the data to a secure enclave on the brand new Apple A7 processor, and then returns a simple yes/know response to unlock the phone or authorize an iTunes transaction. Once you get used to how easy and utterly transparent it is, you start to want it everywhere, and you don't stop. How about the iPad 5 and iPad mini 2, rumored to be coming this October? How about the Mac?