Weber Spices, which is a licensed product, has a food prep truck they drive around to event. But they cook on a Big Green Egg, because the spices are made by ADM not Weber.
I have helped Jamie with some TV events in and around Atlanta. So the segment was made for TV, not directly for a live audience. Still wether it was CNN, The Weather Channel, or a local FOX station we were in a parking lot under a tent. Far cry from the Danish event.
Weber does have something in Chicago called the training center/test kitchen. That would be cool if they would put something on wheels. Char-Broil has a cool rig they attent events with.