agreed - this is all about improving ad engagement metrics. If they can demonstrate that the user was engaged even if they didn't click the ad, then the acquisition is worth the $500m-$1b they reportedly paid for it. I also see the wrist band as becoming linked to payment / libra functionality -- that way it's always on the user and it opens fb to greater awareness in the physical world as well. It's funny how the tech future is finally materializing just the point where we are realizing that instead of utopia, it is turning out to be an utterly repulsive sci-fi nightmare.