The official explanation (which does seem perfectly reasonable) is that one of the techies had been handling the phone and inadvertently caused attempted to unlock the iPhone with the wrong face - thereby activating the security feature which requires you to type in the pin to re-enable Face Id. That is consistent with the message on the screen. All the same, my gut suggests that you’re probably better off waiting for the second generation of Face Id for better reliability. EDIT - I’m running the iOS 11 Golden Master, but the autocorrect still changed “Face Id” to “Face I’d”. Apple are usually on top of that sort of thing.
My question is was the iPhone X originally going to have touch-id built into the display, but they couldn't do it, and instead of putting touch ID sensor on the back they decided to go all in on Face ID?
I think FaceID is cool but impractical. But then the impracticality of FaceID matches that of TouchID. Like, if you injured your face (like in a car accident), then you can't unlock by FaceID. Similarly when you injured your thumb, then you can't unlock by TouchID. But since it always fall back to Passcode, there would be no problem.
The big question is how secure is it - how well does it reject faces of other people? That needs to be tested.
Not that good, afaik. Right off the bat I recall ~30% false positives, plus some rather easy shenanigans to fool it. Don't have time right now to check for sources. If noone else finds any and you folks really want some, I can dig around a bit in the evening.
