CEOs who need big, fast digital pipes—and, increasingly these days, that could be just about anyone—are looking closely at metro areas that can hook them up with 1-gigabit broadband networks ranging from Chattanooga, Tenn., to Dublin, Ohio, to Detroit. But near the Orlando airport, the 11-square-mile Lake Nona development represents one of the single most concentrated areas of 1-gigabit bandwidth in America, and the rapid development of this sunny economic enclave is ratifying investors’ decisions to “build it and they will come.”