I'm strongly cross-dominant [1], I write left-handed and mouse right-handed (I also swing right-handed in baseball and golf, but box southpaw so go fig). As a result, I have no comfortable hand to wear a watch. In high school I got by with cheap pocket watches for awhile. But let's be honest, pocket watches are not a great fashion statement.
The mas market adoption of cell-phones was great for me, since they're essentially pocket watches with a phone (and now a computer) attached.
I've seen various smart watches over the years, but I inevitably fall back to "but I'd have to wear a watch".