Is there a watch that looks like Pebble or Garmin Venu (e.g. small and square) that is good for navigation? I want to walk and look at the watch to see which direction to go next. It would be great for traveling in a foreign city.

At a different angle: can there be a "watch face" that shows a bit of map, and directions, while the proper navigation app is running on the phone?

Yup, I want to set a destination, walk, and only look at my watch for direction.