A high-tech Coca-Cola billboard that can react to weather and movement has been erected in London's Piccadilly Circus. At 99-feet-wide (30.17m) it is the biggest in Britain and the widest in the world. The billboard is able to recognise people waving to it from the ground below and respond to SMS messages. Big drops will appear on the screen when it's raining and the Coke sign can ripple when the wind is blowing.
