You people are ridiculous on so many levels. You have an issue with "oh no the face id thing failed! Ahhhh" then its confirmed that it didn't actually fail and you move onto the next thing you could conceivably be upset about "ohhh wow. So it didn't fail. BUT what if a bunch of random people are just staring at my locked phone??"
You people are just looking for reasons to be upset. Jesus Christ people. It's never ending. Dreaming up scenarios that most likely won't happen ala Touch ID "what if someone wants to rob you and cuts your finger off?!?!"
Just take a break and enjoy the current state of tech for a bit. We live in amazing times
Remember when Touch ID was first announced? "What if someone cuts off my fingers/hand?" or "What if I am knocked out and someone tries to unlock my phone with my hand?".
It really is never ending here.
And to everyone, this is the first generation of Face ID. Remember how slow Touch ID was when it was first introduced? I also didn't realize that the iPhone X was already out. Why does it matter if an unreleased phone and technology encounter an issue?
What about the BSOD during a Microsoft demo? These things can happen. This is technology. You can plan and prepare for the demo for MONTHS, but still something might happen. That is why they have backup devices.