[TheOtherHobbes]

Wearables don't necessarily need a screen, and if they do have a screen, a more elegant version of Google Glass is going to be more persuasive - when someone finally gets it right, which they will in the next few years. (Could be Apple. But I'd put money on someone like Huawei.)

The watch format is a dead end.

The user benefit of the iPhone was obvious. The user benefit of a wearable watch is not obvious at all. As soon as you call the product a "watch" you're constraining the possible design and the user expectations, and also competing with hundreds of years of history.

As for health - for now, FitBit does it better.

A permanent on-wrist health lab with medical record sharing would be amazing, but the technology for that is a long way away.

Meanwhile Pokemon Go has done a lot more for health than any wearable has.