If you took your average kitchen timer with a rotary dial and combined it with a power strip, the Energy Lock is what you would end up with. The device is a power outlet with three plugs that you can plug your TV, computer, or anything else into.
The plug rotates to allow you to set how long the device plugged in will get power. Once the timer runs down the device is automatically turned off. You can also give the thing a full twist and have constant power.
The idea is pretty cool, but the issue I see is that most power outlets in my home are behind stuff. I wouldn't be able to get to the thing to turn the timer. I think this would be interesting tech for a surge protector though.