I installed a Nest thermostat a couple years ago with a friend and it was definitely a neat invention. They plan on releasing CO detectors and Smoke Alarms soon. You may ask what's the point but the CEO mentions how the CO detector can tell the Nest Thermostat to shutoff the furnace. The video was an interesting watch and I agree with a lot of what the CEO had to say. The CEO and a lot of their employees came from Apple.