Behold the Greenpix Zero Energy Media Wall, a gigantic LED wall completely powered by solar energy!
Gizmodo has the story:
Greeting visitors attending the Xicui entertainment complex near the site of the games is a 20,000 square foot wall of computer-controlled LEDs, the largest of its kind ever built. Better yet, the wall manages to power itself completely using only the sun.
The GreenPix Zero Energy Media Wall, designed by Simon Giostra & Partners and Arup, uses thousands of solar capture cells attached to each of its glass panels to charge up during the day and then release dazzling light shows at night. It's the first time perforated photovoltaics laminated in glass have ever been used in a building in China, but if all goes off without a hitch, it most certainly won't be the last.