We film types talk a lot about James Cameron's "Avatar" and its white savior story, often comparing it to a film like "Dances with Wolves." Less discussed but just as problematic are the movie's ableist overtones. Let it not be forgotten, Cameron's 2009 blockbuster sees its main character happily dump his disabled human body in favor of a genetically-engineered "avatar." In a similar sense, the film presents motion-capture as a way for directors to "transcend" the physical limits of their actors.