New associate director Kathy Halbreich isn’t the only change coming to New York’s Museum of Modern Art. “During the last eight months a younger generation has made its way onto the curatorial staff, with six new hires — all people in their 30s and 40s — in departments ranging from film, media, architecture and design to drawings and prints.” The upshot, MoMA hopes, will be a dramatic reinvigoration of the museum’s mission.