There's more chaff than wheat in a new exhibit about the future of Chicago, but I still recommend that you see it, if only for the sheer fun (or dread) of contemplating some truly out-of-the-box visions of the future.  My favorite in the sunny, George Jetson genre of future-casting comes from architects Brad Lynch and David Brininstool (below). They envision public vehicles powered by an umbrella of magnetic energy that would float over the city...more.