The video below, courtesy of mmosite, shows a gentleman in China playing World of Warcraft on a 250 meters long and 30 meters wide, the LED screen: 'the sky screen'.The site explains, "On the evening of November 21st, 2010, online gaming scenes were suddenly shown on the sky screen of The Place, which's located in Beijing and themed by "Everyone in Beijing Looks up". At 8:40 p.m. on that day, a man drove his car under Asia's currently largest LED screen that's placed above The Place in Beijing, opened his notebook PC with an access to the wireless network, and played the online game lying in a prepared lounging chair."
Thanks to Girlgamers for the tip.