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If you think the online space has a monopoly on additions to the ever-growing list of media, think again. Here come the Sailboards.
The world's fastest growing cities are all sitting on either rivers or harbours. A giant TV screen sailing back and forth is guaranteed to reach a massive audience. And let's face it, riverfront property is most expensive in the world, so purchase power guaranteed!
Not sure if this has been done before, but Shanghai is the first place where I've ever seen this.