Google's letter to the SEC hints at advertisements coming to connected appliances, cars, and devices

So, does this means your Nest thermostats and smoke detectors will start serving the same ads you get on your mobile and desktop screens? “Our expectation is that users will be using our services and viewing our ads on an increasingly wide diversity of devices in the future.” - reads Google's ambiguously-unambiguous letter to the SEC. Then again, at the time of its acquisition, Nest did reassure users that its privacy policy "limits the use of customer information to providing and improving Nest's products and services", so the possibility of thermostat advertisements is somewhat up in the air.
Android, however, already runs on most mobile devices, and is heading towards cars, wearables, and the kitchen sink. So, kindly, but with a hint of ominous, we suggest you keep an open mind.
source: WSJ
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