> authentication to some extent The "to some extent" part is precisely a big part of my point when I mention fragmented standards and absence of critical mass.

> authentication to some extent The "to some extent" part is precisely a big part of my point when I mention fragmented standards and absence of critical mass. An incomplete killer application is not really "killer". Other devices (e.g: Android wear with smart-lock and Google Pay) also suffer from the "to some extent" illness. But you made a very good point about FitBit not being able to replicate. Their devices are too focused on health and notification. They don't even have the hardware to go beyond that.