Justin Davidson: “Most of us can imagine only what we already know, and even the fantasies of visionary filmmakers can be astonishingly earthbound. The inventors of nonexistent cities don’t have to worry about building codes, zoning, financing regulations, or even the need to make their structures stand up. Rather than use that freedom to unleash radical design or dream up darkly beautiful architecture, they simply recycle the present and make it bigger, and worse.”