It is probably the same grin I get when I think of MagLev trains that were going to 'revolutionize' transportation when super-conductor magnets made frictionless mass transit obsequitous. Hopefully there will be some solution that won't end up being more than a back issue of Popular Science. :-)
Speaking of the maglev, I wonder how many people remember its predecessor, the Aerotrain...

http://en.wikipedia.org/wiki/A%C3%A9rotrain

I thought it was great. Much more economical. Not sure why the aerotrain was abandoned for the maglev. I guess politicians like to fund pie-in-the-sky technologies instead of something simple.