I have to disagree in regards to the Nest. Most houses still have their original thermostat. I don't see the Nest ever causing a house to sell for less. Even if

I have to disagree in regards to the Nest. Most houses still have their original thermostat. I don't see the Nest ever causing a house to sell for less. Even if Next/Google stopped supporting the product it would be trivial to replace it with a cheap conventional thermostat.