Re: Ring around the problem?
Here's a good test of the utility, or lack thereof, of a wearable device. Substitute the words "smart human" for the object in question...
"The [smart human] can also be used to control a number of smartphone functions, using built-in buttons that let it interact with the notifications and perform set actions. For example, [the smart human] can accept or reject incoming calls, make outgoing calls to preset numbers, trigger the camera, control music playback, and change the user's profile."
If that seems perfectly reasonable, you're probably better off handling that task with your smart brain.