But creating the right ads for digital billboards will be a challenge for advertisers and their agencies.
On Monday, the billboard will be replaced by a new one featuring Shaun White, the gold medalist snowboarder, holding a pack of Stride Mintacular, a new flavor that features his likeness on the package.
In New York, a billboard will be in the Times Square subway station in the corridor from Times Square to the Port Authority.
In a new outdoor campaign across the UK for British singer Cheryl Cole, who has a new album coming out and a concert tour, fans who check into the billboard will be taken to her Facebook page and get a chance to win two free tickets (plus travel and hotel) to one of her X Factor shows.
Billboards will be all digital, but not based on TVCs - they have to be even more efficient.
In the language of supersigns, the Walgreen billboard will be "densely populated" with L.E.D.'s that are as close as six millimeters apart.
On Monday this billboard will be going up on hundreds of sites right across the United Kingdom, and even if the politicians don't want to discuss this issue, I think this very simple, straightforward message is going to get the public talking about it," he said.
Passers-by who see the sidewalk billboards will be asked to take a photograph of the ad that represents their point of view and upload the photo to Twitter or Instagram using the hashtag #VoiceYourView.
Public Viewing How Many Billboards? will be on view on billboards throughout Los Angeles and is accompanied by an exhibition at the MAK Center and public programs throughout its run.
Mobiltrak plans to introduce a digital version next year, and when it does, the billboards will be able to react nearly instantly to the demographic patterns of drivers in the area, switching the ads it displays to target drivers ever more precisely.
