Brad Bird’s so-far stellar directorial efforts have shown an ability to draw on older forms and attitudes and render them with a fresh, impressive sense of movement and action. Humanist classic The Iron Giant’s story of small-town Americana resisting cold war hysteria was a hand-drawn animation released as the industry barreled towards computer generation. Later, The Incredibles told a superhero family drama in the style of old-glamour spy movies, laced with a critique of the modern world’s low horizons. Tomorrowland, channeling the futurist enthusiasm of Uncle Walt’s original theme park ride, is steeped in the golly-gee wonder of Bird’s Space Age youth, with its jetpacks and rocket ships…