Earlier quoted context omitted.
I wonder if Nest is using it with their new cam[0], as it has person alerts now (with face detection). [0] https://nest.com/camera/meet-nest-cam-iq/
They would probably use FaceNet[0] then, if they only want to detect faces, as that should give better results. [0] https://arxiv.org/abs/1503.03832
Except they wouldn't be able to detect people wearing masks, which is probably an important thing for a security camera to do...