It might seem like all three companies are duplicating effort and inventing the same things, but digital assistants that help us communicate easier, access great content easier, and get stuff done easier, are where human-computer interaction is headed.
I don't know if you are using voice enabled UIs, but from someone who's using public transportation to go to work in the morning, that's not "a little annoying", that's a big no-no. Talking to your watch spooks people around you like crazy, and having to repeat 2 or 3 times (because noise, eh) your command is just uncomfortable. Worst case ever is sending texts with that (as everybody is actively listening to what you are saying).
Sure, these technologies make great marketing material, but apart from the glowing on-stage demos, the actual use case of voice control immediately dies when there's either other people or loud (and fully quiet) environments.
One interesting aspect of voice vs. tactile that remains overlooked is the amount of energy required for performing something with your phone. It is not at all obvious that voice is less energy consuming for us and thus more convenient. Never heard of any research that would prove it.
This technology is designed for our self driving Tesla future
I find there's quite a large disconnect between what people _imagine_ others will find odd, or will 'spook' them, and the reality - which is that the people around you simply do not notice or care.