One of the most distinctive features of that quintessentially American playground known as Disney World is the way it seeks to combine a sense of comfortable — even nostalgic — familiarity with an air of innovative technological advance. Mingled with the fantasies of one's childhood are the dreams of a better future. Next to the Magic Kingdom is the Epcot Center. As well as providing for a great escape, Disney World claims also to be a design for better living. And what impresses most about this place is that it seems to run like clockwork.