For example you are actually at a meeting and you want your phone to get into silent mode. Just like starting a Tasker action. Tap Action is perfectly for that but if the watch vibrates on that every one around you would notice the qiet loud vibration. A message on the screen that the action has been activated would be nice for that. Nice side effect would be that this method saves battery life (every one should know - battery life on smartwatches is a big problem).