I like Dave Farrington’s idea of a multi-layered security system for iPhone to replace complex passwords.
If 3D face recognition comes to iPhone 8 later this year we could expect similar capability to show up in iPads and even Macs in the future. But what I want in device security is that sweet combination of ease-of-use and high security. Touch ID is very good, but limited because there is no combination with other secure methods. Add face recognition to voice recognition with a passphrase with Touch ID and that combination would seem to increase security to a substantial degree