The current fascination with smart watches reminds me when I was in high school in the 80s and there was a brief fad of full feature electronic watches. Calculator watches were in the geek must have list, but there were also kids with watches featuring radios or mini-LCD screen games. There was even a rumour of a someone in school with a tv watch, which as it turns out wasn't so far from the truth.
None of these watches were very successful, for the simple reason that the watch as a form factor was never well suited for these tasks. Trying to use a calculator in a watch was slow and frustrating. It seems that the people trying to cram features into watches nowadays have forgotten how much of failure this was when it was attempted in the 80s