Hope you're kidding. Computers, etc. get cheaper because of breakthroughs in semiconductor form factor, power, and efficiency. Smaller, more powerful, and cheaper transistors, etc. are why today's $399 laptop PC is dozens of times more capable than a circa-1995 desktop. Nothing remotely so revolutionary has happened to air travel. We're still moving at the same speed, in the same kinds of cabins, as we did in 1958 when the 707s came in, with marginally more efficient engines bolted on. In fact today's Boeing 737 fuselage width is dictated by the jigs created to manufacture the 707 and 727, which were descended from military applications that dated from the early 1950s.

In fact, one of the most striking things about the airline experience from the back-of-the-cabin perspective is how dramatically it evolved 1930-1960 and how little it's evolved since.