Rich Mogull, writing for TidBITS:

Put simply, Face ID is the most compelling advancement in security I have seen in a very long time. It’s game changing not merely due to the technology, but due to Apple’s design and implementation.

And:

I believe Face ID is slower at actual recognition than Touch ID, but it’s nearly impossible to notice due to the implementation. In the time it takes to move your finger to the Touch ID sensor, Face ID could have already unlocked your iPhone.

That’s the real Face ID revolution. Since you’re almost always looking at your phone while you’re using it, Face ID enables what I call “continuous authentication.”

This is a fascinating article, worth the read. But even better, if you’ve not yet seen it, is the video embedded in Rich’s piece, which I’ve embedded below.

In it, Wall Street Journal’s Joanna Stern tries her best to defeat Face ID using siblings, triplets, and a well crafted theatrical mask.