Firstly, the premise of that scenario, is the house is cold while the person is gone. That means SAVING on energy costs by not heating the house unnecessarily while no one is inside, which is the current de facto standard. (Do you turn off the heat when you go to work? I certainly don't)

Secondly, it's silly to object to innovation that allows humanity to be frivolous or wasteful according to their desires. Where do you draw the line? Why have central heating in the first place? Is it that difficult to wear a sweater indoors? If people want to be warm, they will utilize technology to be warm. And if that technology progresses to allow this process to be simple, efficient, and automated, people will use it. And not just those in the luxury market.