Transit App has been out for a few years now, but mainly focused on iOS. They do have a Android version, but Android support has always been slightly behind. However, they have stepped up their Android game and released an update to allow you to look at transit directions right from your Android Wear watch.
With Android Wear support you will now be able to see upcoming departure times, stop announcements, Uber, car sharing and bike sharing integrations, and much more. This could all be done from the app on your phone before, but trust me, it's much more convenient to quickly look at your watch for directions than it is to take out your phone.
