We see wearables on the rise. But when we says "wearables", we mostly mean smartwatches and, more often and more ubiquitous, fitness bands. While the term "wearable" itself seems to cover a whole swathe of products, why is it that most, if not all, wearables in the market are those that we can only wear on our wrists? And why are almost all of them, even those that we don't wear on our wrists, seem to be focused, if not totally dedicated to fitness and health? Are wearables fated to be tethered to this particular use case?