I think CGI in film opening sequences is very important. i think this because it tells the viewer straight away whether or not the directors have spent a lot on the film or not. CGI is mainly used in thriller, action or fantasy films. An example of this is in King Kong, CGI is used throughout the opening sequence, and helps mark the film in the viewers head. CGI determines whether or not the directors and producers spent a lot on the film, which ultimately can tell you how good the film can be or not. The more you spend on the film the better it will look. Special effects make the film look more realistic which draws more viewers to go and see it, this will help the producers get more money.