Re: Too much smoke
Fair points, and you cover the costs / benefits of wearable tech.
The 'costs' (compromises) of wearable tech are fairly clear: small displays, less scope for user input, limited battery life, aesthetic concerns, size/weight constraints...
The benefits of wearable tech - taking my wristwatch as a model - is that it is always with me (should my phone run out of batteries, or I haven't taken with on the canoe trip / music festival); I can still tell the time. It is more accessible than my phone - which usually requires fumbling in my pocket to retrieve.
An added advantage, which is relevant to our population that is getting both older and fatter, is that wearble tech can be in constant contact with the body... so potentially could be used for monitering the heart rate, blood pressure, or maybe even blood sugar levels (for diabetics). It's worth noting that Sony are getting into healthcare, and Apple might be (they bought a hearing company, but maybe they bought it for IP applicable to phones, I don't know)
A piece of wearble tech has to sit in a niche (if such a niche exists) where the benefits to the user outweigh the costs. A monitoring / data logging device, for example, doesn't require a display (or traditional user input at all), so those two 'costs' can be potentially struck off the list in that context.