IBM Information Technology Architect Jeff Mausolf points out a computerized electric meter (C) and a "smart thermostat" (L) that can communicate with each other to more efficiently use power, at the IBM's Solutions Experience Lab in Austin, Texas, on March 18, 2009. Nest is a smart thermostat that learns when you wake up, when you go to sleep and what temperature you like the room during the day — all while retailing for $250.