Because nothing is comparable to the crisp, bright images and rich sound of 70mm film. . It traditionally offered richer sound, with more space on the soundtrack as well. It is the ideal film format for ambitious cinematic spectacles. 
This summer, Museum of the Moving Image in Astoria, will present See It Big! 70mm, every weekend from August 7 through 30, featuring eight 70mm masterpieces
Interstellar (2014) The Master (2012), Lawrence of Arabia (1962), 
West Side Story (1961), Mad Mad Mad Mad World (1963), 2001: A Space Odyssey (1968) Brainstorm (1983), and Tron (1982),
nontouristytourist.com 