At the Denver Auto Show, the Saab display was amazing. Not for the cars (though I do like the new 9-5) but rather for the giant screen at the end of their rectangle. It was one giant TV. (Sadly, the top photo does not do it justice.) It was made of LED panels that were assembled for the show. Think: one of those giant displays at a big-city football field, only one that the roadies can take apart and reassemble multiple times.
The lower photo shows a closeup of the backside of the display. Each panel section was about 2 x 3 feet and was made of lightweight white plastic.