tbd if this integration is broader than what Nest already does with iOS devices; also see Ahead of I/O, Google’s Nest Labs Opens the Door to Third-Party App Makers (Re/code) and Works with Nest (Nest)
"The integration will allow those users to set the temperature of their homes with voice commands to a Google mobile app. It will also allow Google’s personal digital assistant, Google Now, to set the temperature automatically when it detects, using a smartphone’s location-tracking abilities, that a user is returning home.Nest To Share User Information With Google For First Time - Digits - WSJ
Users will have to opt in for their information to be shared with Google, Rogers said. “We’re not becoming part of the greater Google machine,” he said."