I agree with you to an extent. Big Oil is fighting any advancement of new technology that might threaten their bulging pocketbooks. However, a lot of this new technology costs a lot of money to implement. In the long run, it will well be worth it. But you have to consider the ramifications of pouring a lot of money into something new and then finding out that it is plagued with bugs or doesn't work at all. I just read about a new hydrogen powered car today and GM is unveiling. It seems to work like they want it to, but it said that if it were to retail today, it would cost as much as a warehouse full of corvettes.
We are heading in the right direction, but we still have a way to go. With that being said, maglev trains are a different story. They have been around for some time, and I do not think there is the need to such cautiousness as to if it will work or not. I think they only need to consider if consumers will use it enough to make a viable alternative to transportation. Personally, I think it would be big hit!
By the way ... here is that article ...