Cable management is one of the most annoying aspects of modern electronics. Pretty much every single device you connect to your computer or home theater needs a power cord, and tons of products — even whole companies — invest their efforts in keeping the knots to a minimum. The Outlet Wall "reverses the telescope" on the entire idea of wire clutter, putting your cables front and center by covering a wall with power outlets.
The concept is pretty nutty but actually kind of cool — and definitely practical. You'll never have to hunt for an outlet again, and the pattern is just as appealing as wallpaper. The power management for such an array would probably be a nightmare (and I wouldn't try plugging toasters into every outlet), but for a media room that's going to have the lights out most of the time anyway, why not?