There really isn't anything in development that better serves markets such as Tokyo-Osaka, London-Paris, Boston-New York-Washington, Los Angeles-San Francisco, or dozens of other large city-pairs between 200 and 500 miles apart (and even better if there are smaller cities in-between). And the sooner naive politicians in California and the rest of the U.S. stop getting distracted by magic vac-trains, monorails, battery-powered HSR, and other vaporware alternatives, the better.