It's yet another SV bubble "innovation" that's only useful on the west coast.
It's not going to work in half the world for half of the year. Winter. Pockets. Gloves.
See also: Apple EarPods, with the cords that get brittle in cold weather and become useless tangles that fly up in your face.
See also: Every iPhone I've ever owned which has gone into emergency thermal shutdown just because I dared to use it in Arizona or Nevada.
Even in cold countries we spend ~90% of our time inside and much of the ~10% outside in decent weather. The average American spends 7% of their day outside with some obvious outliers push that upwards. The world average is 87% inside. [1]
Plenty of products are only used a few times a day. I don't think the downtime spent walking around outside shopping or commuting is the killer.
The question is are there enough of those uses to justify wearing it all the time. Not if it works in 100% of situations.
1. https://www.creditdonkey.com/time-spent-outdoors-statistics....
That's more than 2/3 the population of France, 3/5 the population of Germany, and 1/6 the population of the US.
Apple earbuds may not work great around the world but it's decent product for those 50 million people, and based on social media appears to work well for other people in similarly temperate climates, like southern Europe, Australia, etc.
I suspect this is just a kludgy initial version of some future thing that could eventually become really popular.
Why does it have to look cool? I want an assistant/gadget whatever that goes out of the way and that I don't have to think about. Ideally it would be invisible, weightless and require no maintenance or charging.