Originally Posted by stratosk
I'm sorry but I don't find useful on N5X because of fingerprint sensor. It provides the same functionality plus security.
Not the same, because you can't unlock while the device is on the surface. Also you have to keep finding the place to put the finger, while here you have a huge space (the screen) to trigger it.
About security, I don't mind it much, unless I travel, which I don't do often at all.
You could add it as an optional feature.
It's quite a common feature on phones. No idea why it didn't come to the Nexus 5x, because it seems to me that the hardware supports it well.