When considering the 4 step business cycle, I'd say the airline industry is leading the maturing stage in aviation. We've had our introduction and our growth period. Usually, after the maturing stage there is the decline, which usually means competition for the current product. In this case competition could be more privatization or a more widely available product or just plain easier to use, or ANYTHING.
I think were gonna keep maturing for about another decade or so. The industry likes this, weilding the market as they are, so they can concentrate on making more capital for their own uses I suppose. Afterwards, then they can decide on technological investment jumps. I guess we are waiting for them, the big guns, to use it all up and look for other ideas...
I am certain that even asking this question puts us in the minority bin, a lot of people like the way things are because it hasn't changed -- it has been maturing -- evolution is slow in the end.
Big moves take lifetimes; personally, I'm making it mine.
The meaning of life is curiosity; we were put on this planet to explore opportunities.