This is a design for a universal on/off switch for your whole house. Anything non-essential could be wired through it, enabling you to easily turn off all those standby devices in one hit.
"Push the button to turn your house on when you get home; push it again to turn it off when you leave. Aiming to make the ‘green’ way the most convenient way, the ‘House-off’ Switch was part of a larger project to encourage 'green' action among the environmentally disinfranchised."
However, judging by some of the comments left on the site, these are already a fixture in some European homes. Do any TreeHugger readers have them? :: Yanko Design