While the broad outlines of the new iPhone are now widely known, both literally and metaphorically, some of its new features have to be seen to really be appreciated, sources said. That's especially true with the facial recognition that serves as the primary means of logging into the new iPhone.
The bottom line: Those who have seen the technology say it is light years ahead of anything that has been tried commercially. A good parallel is the Touch ID fingerprint reader Apple introduced with the iPhone 5s in 2013. There had been fingerprint sensors on phones before, but none with the speed and accuracy Apple introduced. Now Apple is doing the same for faces.