Renowned Apple analyst Ming-Chi Kuo of KGI Securities predicted that iPhone 8 would supplant Touch ID with advanced sensors capable of recognizing one's face with very high accuracy. JPMorgan analyst Rod Hall corroborated Kuo's report, speculating that facial recognition would utilize a front-facing 3D sensor.
For many people, this has been one of the tougher iPhone 8 rumors to swallow. For starters, how would iPhone 8 authenticate the user in the middle of the night? Or in complete darkness? Touch ID lets you unlock your iPhone without looking whereas facial recognition would require you to face the sensor, a major inconvenience.
A few reports have attempted to shed some light on the subject, explaining the basics of 3D motion and object scanning and how Apple might leverage 3D sensors in iPhone 8.