The User Experience behind always listening devices

A couple of months ago I watched the movies ‘Her’ and ‘Computer Chess’.
In essence, they were two ends of the same spectrum, demonstrating how computers interact with us instead of us interacting with them, with computers being the active initiator, instead of the passive responder to our instructions.
The world in ‘Her’ is not far removed from the present — where people seem comfortable with computers and devices prompting interactions with them on an almost constant basis.