The Sony LX900 could be the start of something very energy efficient, and potentially creepy. Sony's new line of 3D TVs feature facial recognition and presence detectors.
The new technology in the Sony LX900 means that if you aren't looking at the TV, or if you aren't in the room, the TV will shut itself off. The electric bill would be slashed, but this could get annoying if you are just stepping out for a second to grab a snack or go to the bathroom. I probably won't have the money for a Sony LX900, but this technology might become standard on all televisions sooner rather than later.