Why? Because Interstellar is not merely a movie; it is a physical experience. Nolan shot large portions of the film with IMAX 70mm film cameras—resulting in sequences that open up vertically to fill the entire IMAX screen. On a standard TV or laptop, you lose nearly 40% of the image.
However, be warned: Once you see Interstellar in variable 1.43:1, you cannot go back. The standard Blu-ray will look like a postage stamp. You have been updated. interstellar imax version download updated
In the 2014 theatrical release, the special effects (like the Gargantua black hole) were rendered to cover the massive IMAX frame. However, on the home 1.78:1 release, the top and bottom were simply cut off (cropped). on the home 1.78:1 release