Nam June Paik’s multipart show “Electronic Super Highway,” which originated at the Ft. Lauderdale Museum of Art and travels to the Pennsylvania Academy of Fine Arts late this month, addresses how our everyday has been transformed by technologies of communication. In Paik’s cyberville, craggy hedges composed of discarded monitors, cameras, antennae, and cassette tapes border houses, public buildings, towers, billboards, and trees. It’s a daffy Land of Oz, only the Wizard isn’t lurking behind the scenery, he’s chattering and blinking from every possible screen. While the installation at times