Every morning I get up, plug in my phone & iPad, make coffee in a French press, and say to my watch, “Hey Siri set a timer for 4 minutes”. At least 2, sometimes 3 other devices (finally on Sierra just in time for High-as-in-grass Sierra to come out) beep and try to catch that. Usually they all fail except the watch. If they do succeed, I now get timers going off in multiple places, because despite Continuity nothin communicates this state.
And Apple wants an Apple TV and Apple Home to join that mob of Siris.