Film the airshow with 3D panorama cameras. Then troop off to nearest IMAX cinema where virtual attendance will be experienced and suitable smells injected into the air. You can take your own picnic. The same show can be visited by 1000's over a few days; no muddy bogged down cars; no endless queues to enter/exit. There would even be pilot-eye cameras on board many a/c and you could fly a Red Arrows or Extra 300 or Pitts display etc. from the inside. A few hardy souls could brave the day it self. I wonder at the business plan, but there have been dafter ideas. There are some fantastic airshows in stunning settings that most of us can never attend. I think of the summer show that used to be over Lake Geneva. I was sat on the neighbouring hills and watched the military formation displays from above: truly stunning. Over a season the enthusiasts could revel in a magnificent choice of worldwide shows. Much better than U-tube.