I'm watching the March event again and, with my iPhone plugged in next to me, every time Kevin Lynch says "Hey Siri" she comes to life on my phone. It looks like AppleWatch works the same way, but doesn't require the device to be plugged in. I can foresee a time when "Hey Siri" activates multiple Apple watches say, in the office. Am I missing something or has anybody got any insight on this? Not sure why Apple doesn't allow the user to essentially remap "Hey Siri" to something more personal.