I don\'t see how you can get the same number of seats on an airline without stacking them. You are giving more leg room to the people, so how can you fit the same number of seats in an airline by doing something like that? On the ones I\'m usually on, the seats are plenty close to eachother side by side, and there wouldn\'t be room for extra seats that way.
As for the ladders, I don\'t mean that they are a bad thing for injury related reasons (although with air turbulence and such, which can often come at unexpected times, having people climb up and down ladders to go to the bathroom and such probably isn\'t the best idea). It\'s all about convenience. Americans, on average, are lazy. Why would the idea of climbing a ladder to get to their seat ever appeal to the average American? I don\'t think it could be marketed here at least. It just wouldn\'t be appealing. Stairs are also very different from ladders in their basic design. On a ladder, you have to hold yourself up. Your weight is naturally centered on what would simply be air, when you climb it, and you have to pull on the ladder to keep your balance. Stairs don\'t have this problem, making them easier to use, more appealing, and less likely to cause injury. Sure, things we do everyday involve some risk, but when the risk is created by the setup of the airline, that\'s when you\'re putting yourself at risk of being blamed for any problems that may arise. I really see those ladders as a lawsuit waiting to happen.
Besides, the problems would would extend beyond people who have a physical inability to use such a system. What about claustrophobic people? Or those who already have a fear of flying, and are now put in what appear to be more difficult to evacuate situations, where they could be off the floor of even the plane? Also, imaging being the poor guy sitting below a pair of kids, who have decided they want to stomp their feet on the floor below them. I don\'t see how that noise wouldn\'t carry to the floor below.
Sure, the system has some obvious benefits, but with the risk involved, and the investment that would be required to make something like this available, it just doesn\'t seem realistic. Proposals like this have to be a lot more air tight than this appears to be to me. I don\'t know much about it at all, and I can already see problems arising with implementation, marketability, and safety/comfort issues. That probably says something.
As for the advertisement, I don\'t mind if you stay around, especially because this topic is getting some discussion out of it. It\'s just that all too often people come here, post something promoting their site, then leave.