The Rambler Socket.  Designed by Meysam Movahedi.

The Rambler Socket is one of those concept ideas you see and think “Oh, I should have thought of that!”  Basically is an extension cord built into a standard wall outlet.  The 1.5 meter long extension cord itself hides behind the wall and can be unfurled when needed with a slight tug.  To access the extension cord, you simply pinch the sides of the outlet and it unravels right out of the wall.  When your ready to store it away, you give it a gentle tug, which activates a spring mechanism, and it wraps itself back in an organized fashion.  This really is the best and most efficient wall socket and should be installed in all places of stay immediately.  It’s actually a concept I can see becoming a reality very soon.

[Via Gizmodo; YankoDesign]