Read "Elon Musk Says Robots Could Be More Dangerous Than Nukes"
We're almost there now.Today, If the government deemed it was in your best interest, anyone with a smart thermostat could have the temperature adjusted to whatever the government deems to be the "proper temperature". Or, any car with a black box could be disabled for your "safety". They could also use "smart meters" to control the amount of electricity you are allotted.
It's only a matter of time. They'll saturate as many homes and cars as possible before they start passing laws to control them.