This looks literally perfect for something like a smart display. I have a google home smart display on my desk, and I like to keep it back far enough that it's a bit of a reach to touch the screen and interact with it. If i could just wave in front of it, that would improve things significantly! But add in the other benefits of something like this (just being able to sense where a person is around a device like a smart speaker or display seems like it could be extremely useful for better sound projection and better microphone listening), and it seems like it really could be a game changer.
I am wondering why they decided to first release it in a phone, where it seems like it has the least benefits...