For Google, a Toehold Into Goods for a Home - NYTimes.com

Still tbd if your house will be required to have a Google+ account

"Nest’s products track not just a home’s temperature and the presence of smoke but also when people wake up, leave and return home. By incorporating hardware and software and using sensors and algorithms to learn behavior, they program themselves and can be controlled remotely with a smartphone.
Mr. Fadell said in an interview that he was aware of concerns among customers about Google having so much data about people, and that Google agreed that Nest’s privacy policy — which says that Nest will use customer information only to improve its products and services — would remain unchanged. “That was a major concern or question we had, and they have done an amazing job of convincing us that our privacy policies are going to be well-respected in their organization,” he said."

For Google, a Toehold Into Goods for a Home - NYTimes.com