John Gruber:

If you think of a “watch” as purely a device for telling the time of day, then Apple Watch is not just a watch. But if you think of a “watch” as a wrist-worn glance-able display of status information (including, perhaps prominently, perhaps not, the time of day), and as a signifier of your personal taste and style, then Apple Watch is very much a watch.

Sometimes, perhaps not often, perhaps often, I like to think of my lawnmower not as a machine for cutting the lawn, but as a machine for exercise.