Personal Rapid Transit?

I have always thought even mass transit would turn to a more "private" experience. Check out these little personal transportation pods present at London's Heathrow Airport:



Thanks, Planetizen. Do you think there's a possibility to take this concept to city streets?

(EDIT: Oops! I forgot about Morgantown's PRT, which is actually mentioned in the video! I was thinking of Morgantown's example as more of a short-car light rail system like Detroit's People Mover.)