A when-can-I-be-home watch
Here's a thought: the current time almost never matters. Right? You never really care what time it is, you care what the consequences are.
A bold claim: whenever you look at the time, it's an interim calculation, where your location, calendar, and biology are some of the other variables.
Smartwatches are computers. They can handle variables. Why don't they try and give you that end result rather than just telling what time it is right now?
This watch face for Android Wear has an extra hand that tells you when you can expect to be home if you leave now. It uses the GPS to figure out where you are, along with the most likely mode of transport.