Good thought experiment, though I do think Soli still makes sense. There is no reason Soli doesn't work exactly the same as a remote - there is no need to unloc

Good thought experiment, though I do think Soli still makes sense. There is no reason Soli doesn't work exactly the same as a remote - there is no need to unlock the phone if the chip is always on, and can even detect when a user is engaged prior to an action. In my mind the only difference between a button on a remote and a "button" that sits in the air above my coffee table is reliability, which will be solved in the future. I know pressing button x does y, it makes equal sense that moving my hand like x does y. Feedback could be anything from a puff of air, tiny light flash, small 'ding' sound, etc.