If I had a Samsung Watch 7 sitting on the table next to me, can I start a phone call by speaking to it? Without picking it up? With the screen off? Not sure what Samsung requires to initiate a phone call through a connected phone...
Not really, and the portion that requires your 'input' isn't the phone: it's the watch. While you can initiate a call from a locked phone and a paired watch, you cannot initiate a command on the watch without waking it up first. So the 'sitting on the table next to me' part is the one that wouldn't work unless you had the watch awake/unlocked and THEN gave it a voice command to make a call.