So here's the thing about Google's creepy smart home gadgets. None of this is really new. I made a smart home type of system over a decade ago, with more sophisticated features than are described here, such as elaborate computer vision indoor and out, and gesture control.
None of it required the data to be sent to anyone else's server, and definitely not to Google.
All of this type of data can be under the control of the user, without any surveillance being conducted by a megacorporation. Home automation can be quite useful, depending upon what your needs are, although I found that doing this type of thing wasn't especially useful to me so I abandoned it after a while.http://www.bbc.co.uk/news/technology-42989073