“Virtually all the major studios now have an inhouse facility producing computer-generated (CG) feature films, from Sony’s Imageworks to Fox’s Blue Sky Studios, which created “Robots.” Not surprisingly, the film-release calender for 2005 is filling up with CG films. Dreamworks has “Madagascar,” a tale of zoo animals surviving in the wild, due out Memorial Day weekend. “Chicken Little,” the first film to hatch from Disney’s new CG studios, arrives in November. But some observers wonder how long Hollywood can sustain the CG-film gold rush.”