IT'S A TEAR-JERKER
Nolan’s films are not known for being emotional, but those susceptible to tear-jerking will definitely want to come armed with some Kleenex.
IT WILL MAKE YOU UNDERSTAND “TIME DILATION”
Even if you don’t grasp all the science in Interstellar (you won’t), its user-friendly approach might trick you into thinking you’re a better science student than you really are.