TV on the Tube
One of the many notable features of the Bejing Olympics was the presence of TV screens almost everywhere that we saw during games coverage. They seemed to have TV on the underground trains, too.
I heard one of the London Olympics organisers promising a similar technology would be available in 2012.
Leaving aside the number of more basic technical challenges on London's tube, like controlling the temperatures so we don't have to ride in a sauna as we do now, won't everyone have their own screens anyway by then, on their mobile phones?
Why not get phone signals working in the tube - that would be a cheaper option, surely?
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