Last week, Apple had their annual iPhone press event. In addition to the expected incremental updates to the iPhone 7 and iPhone 7 Plus (and the iPhone 8 and iPhone 8 Plus), Apple announced a third premium model called the iPhone X. This model is expected to ship in early November.
Like several higher-end Android handsets released this year, the phone is designed to expose nearly all the face of the phone as screen. This means removing the Home button on the front, which Apple has historically used for their Touch ID fingerprint biometric sensor. However, rather than trying to move a fingerprint sensor to the back of the phone or underneath the screen, Apple chose to deploy an entirely new biometric system called Face ID, which works by recognizing the user's face rather than their fingerprints.