Those things already exist, it's called an iPhone. Why would I want to wear it on my wrist? I haven't worn a wrist watch in decades and have no desire to wear one ever again. I also feel the same way about underwear.
Before the early 1920s people had no desire to eat bacon for breakfast. The thought to do so was crazy. But then the pork industry hired a PR genius to ramp up sales and the rest is history.
Point being, the public's behavioral attitudes and thoughts on subjects, even ones held for centuries, can change quickly. Don't base what people do today on what they will do tomorrow. Else we'd still be using kerosene lamps and driving horse and buggies... no women allowed to drive or vote either.