But voice conveniently leaves out exposing to users the capabilities of the software. Have fun exploring all the features Google maps has by barking at the app where 99% of your commands are rejected.
pretty sure folks will be able to just ask what it can do...and the response could of course look like a man page where folks can drill down further. I don't think we necessarily need to think the interactions will exclude a screen...but of course they could depending on the hardware / situation...today that activity might be driving...but perhaps we won't be driving all that much by the time this tech has advanced sufficiently.