Totally.....
Bearing in mind that there are fewer manufacturers due to mergers/takeovers, therefore fewer types of aircraft in general, many more airforces overstretched due to cuts and deployments, many more rules about how close displaying aircraft can be to the crowd line and then the costs involved with flying, very much increased from yesteryear, it should be no suprise.
Just wait until 20 years from now when the shows will be all about who has the the best UAV, and the pilots will be kids playing somewhere today in a living room with a PSP/Wii/Gameboy
SHJ