Nokia has an enormous digital presence at London Heathrow’s new Terminal 5: a display about 30 feet long projecting Nokia lifestyle ads around the clock. The display is mounted on the upper level between the security checkpoints, overlooking the main hall downstairs. How much do you think that costs? And how good is the advertising at prepping people for the Nokia store on the lower level?

My favorite airport advertising, however, is in Switzerland’s Zurich airport, where ads are projected against the tunnel wall just outside the train windows, and follow you as you are shuttled from one terminal to another. Very slick.