I see some more "unbundling" or "fees" but for the most part I think its nearing its end of what will be accepted. I don't see most airlines becoming extreme like charging $5 for a kiosk printed BP. However, $150 oil might change that.

Certainly the glory days of flying are for the most over with. Airlines will continue to focus on keeping airplanes packed to the gills. I also see regular air travel probably becoming more out of reach for certain people as fares will probably also continue a more upwards track.

At this point, a trail of bankruptcies, erractic oil prices, limited consumer income growth and in some cases lack of airtravel infrastructure seems to have kept the Juan Trippe types away. Spirit and Allegiant have been able to capitalize on niches. Flyers of Spirit either are willing to accept the limitations or know how to avoid the pethora of fees. Of course, they also attract the once or twice in a lifetime "low information" flyer that will be in for a real surprise when they get to the airport. So far, the business model works but can it go beyond niche markets when WN and B6 offer a much better product (I'd also say VX but I'm not sure if VX will be around long term.)