Christopher Nolan’s 'Inception' defied the industry belief that summer blockbusters had to be based on existing franchises or comic books. This original sci-fi heist thriller about dreams grossed over $820 million. The film was famous for its use of practical effects over CGI, such as the rotating hallway set built to simulate zero-gravity combat. Its complex 'dream within a dream' structure sparked endless online debate and repeat viewings. 'Inception' proved that audiences were hungry for 'intelligent' blockbusters that challenged them, establishing Nolan as one of the few directors whose name alone could guarantee a blockbuster opening.