"It does not work for me."
"Yeah it does."
What the forget mate.
Having a beard doesn’t mean it wont work, Apple clearly explained how it exactly worked with different face appearances. And it’s not like Apple tested their Face ID system to trust it being the replacement for Touch ID on future iPhones. Neural networks and deep learning, it basically learns your face to recognize it faster and faster as you use it.
you have to align your face right then you have to swipe up, as opposed to just placing your finger on a button and being good to go
and as you saw in the demo it's not as reliable
Rumor said that it didn’t require alignment, and to be honest you don’t align your face as much as you would align your face for iris scanning.
The demo fail explaination was literally on the interface as it happened, showing « Face ID requires passcode to be enabled » meaning the device was restarted shortly before without entering passcode. It was not a reliability issue.
EDIT: Apparently, when you restart an iPhone, it explicitly mention that it need to be reactivated after restart. The message at the keynote wasn’t that, so what happened during keynote is either a glitch or disabled after several tries or too long (8 hours) stand-by time.
https://www.youtube.com/watch?v=K1mAYOzEGy0