When you watch the open matte version, you are technically seeing "extra" footage, but you might also see things you weren't meant to see. This can include: Unfinished edges of sets. Microphones peeking into the top of the frame.
Theatrically, American Psycho was presented in a widescreen aspect ratio (approximately 2.35:1). This widescreen frame is crucial to the film’s satire. It creates negative space. It forces Bateman into corners of the screen, emphasizing his isolation. It allows the camera to linger on the minimalist perfection of his Harvard Club table or the sleek, oppressive lines of his office. The widescreen frame is a mirror of Bateman’s mind: cold, calculated, and obsessed with how things look from the outside. american psycho open matte
Comparing the between the original DVD and the 4K remaster. When you watch the open matte version, you
Older television broadcasts and specific international releases (such as some German rental DVDs) have used a 1.78:1 (16:9) or 1.33:1 (4:3) ratio, revealing significantly more of the image vertically. Why Collectors Seek the Open Matte Version Theatrically, American Psycho was presented in a widescreen
For many, the appeal of an open matte version is a matter of screen real estate. On modern 4K televisions, a widescreen film leaves black bars at the top and bottom. An open matte transfer fills the entire screen, providing a more immersive, "full-screen" experience without the loss of quality associated with "pan and scan" cropping.
American Psycho (2000), shot by cinematographer Andrzej Sekuła, is a goldmine for this format.