For the first time ever, Nest has redesigned its iconic smart thermostat. The new Nest Thermostat E basically does the same stuff the old thermostat did, but it’s not black and steel any more. It’s all white, like the front half of a classic iPod. Very pretty! The new Nest Thermostat E, like its predecessor, is a smart thermostat that promises to save you money by learning your habits and adjusting your air conditioner or furnace accordingly.