CGI has pushed the boundaries of filmmaking but some of the worst CGI moments have completely ruined their movies. The 1973 movie Westworld was the first movie to use CGI in a feature film to emulate the point-of-view of an android and, since then, CGI has developed at an astonishing rate. When used to a high standard, CGI can take a movie to a new level and is often the reason some movies are able to be made realistically, such as sci-fi movies. Tron was the first movie to build a world nearly completely out of CGI and now many movies rely on it to do the same, which can be a blessing or a curse.