I started writing a post a week or so ago on the lack of appeal of wearable tech, but it was boring so I shelved it. And now, conveniently, someone has said more or less what I think and saved me the effort.
(I had assumed calculator watches disappeared 20 years ago. Have you ever come across one in the wild? Worn by an actual person? Surprisingly, that image above is an actual current product, available from Target. Who would buy that? And why?)