Some people are dead-set in saying that demand will increase an extreme amount due to population increases, and while I see certain markets getting bigger (possibly at the expense of others), I don't see this being sustainable in terms of resources and cost. Just think about media and teleconfrencing technologies and how far those have advanced. You don't need to "fly out" and see people or have meetings all over the world, these days you can do it without spending 2K on an airline ticket for every employee that needs to go every time. Like it or not, there will probably be less business demand for air travel in the future as technology improves. Aviation has a hard enough time competing with a prius that can take a family 3 states away and back for $75 in gas at 3.75/g. That's not to say that there won't be demand, but as it should be, it will only be the people that can really afford it and are doing it for the time/convenience. The airline industry has been broken for quite a few years now with the explosion of low-cost carriers and regionals that will "do it all for less" and treat their employees like crap. Maybe we are starting to see things turn around, but in the future that is likely to mean less jobs, or at least not some huge "hiring" frenzy. Somehow airlines would have to become many times more profitable for that to happen, and they aren't even holding their own right now.