How can your face possibly be more secure than a finger print? A fingerprint is supposed to be the most uniquely identifying feature of your body. Couldn't anyone put on a mask that looks like you and fool the new iPhone X?
Good point - facial biometrics are easier to fool than fingerprints, and moreso than iris scans.
During the show where the new feature was announced, it didn't seem to work very well, either. One wonders if most people are just going to stick with swiping a numbered code to unlock.
A fingerprint is harder to fool due to most being captured at a higher dpi / resolution than a standard camera allowing for a more accurate capture to compare real fingerprints against.
A facial recognition algorithm has to leave a little wiggle room due to how your face naturally changes; dry hot weather causing dry skin, cutting yourself shaving, getting a black eye from falling off the bed ...
Your fingerprint on the other hand is much more resilient.
At work they made us scan 2 fingers just in case "something happened" to the other finger.