Hey
In the Benelux we have special road signs for cyclists to navigating. You make your route via the website or app and then you write down the numbers to follow or use the app on the phone. However it would be great to have it on the watch. Very simple things with current route number, distance to next point and next number to follow. Optional current speed and heart rate.
See the link for the Android wear app http://www.fietsapp.be/android-smartwatch