[barrkel]

I use face unlock on my Nexus 7. Not gimmicky at all for a device I pick up maybe 3 times a week, in good light.

For a phone, it's a poor fit. Variance in light levels is too high.

Fingerprint login is something I've had on my laptop for what seems like a decade. It's a gimmick there. But I anticipate that fingerprint unlock could be about as good as face unlock. It has the advantage of working in the dark.