This is a very interesting article by David Learmount and is well worth a read. You can find the full article here:
Air shows like Farnborough and Paris attract many companies selling specialist services, but at their core these big events are about hardware. Most hardware, however, requires skilled "liveware" to operate it, and suppliers of skills are rather less in evidence.
Meanwhile, airlines seem to be starting to order aircraft in respectable numbers again after a period in which cancellations or postponements dominated. The Emirates order in June for another 32 Airbus A380s - bringing its planned A380 fleet to 90 aircraft - just happens to be the most spectacular of a steady stream of new contracts.