Now, what would happen if you had maglev tracks and jet powered trains... and long straight or nearly straight corridors for these trains to run in at full speed?
NY to LA in less than 4.5 hours, for less than the cost of a plane ticket?
For me to travel from NY to LA, I'd have to start in one or the other -- no thanks. :')
Using magnetic rail guns to hurl self-stabilizing darts by the thousands will someday alter air warfare, and ground warfare as well.