Nest - The Learning Thermostat
Not sure why the focusing on the learning alogs or the utility of the thermostat - my guess is that company really isn't about the thermostat at all.  You can almost hear the founders/investors excitedly throwing around the various buzz terms with this one: 'Big Data!' 'Data Exhaust!', 'DataScience!' 'Household Traffic Patterns!' 'Web cookie for the home!!!!'  etc.  Looks like a cynical play at trying to become a BigData company by collecting household energy consumption and traffic patterns and who knows what else. Doesn't seem like it provides enough value to trade off being spied on in your home.