World of Tomorrow is a 2015 American animated science fiction short film written, directed, produced, animated, and edited by Don Hertzfeldt.
The Atlantic describes it as a beautifully told tale of sci-fi horror with the feel of a melancholy bedtime story. Its hero is a little girl named Emily who gets a phone call from her future self—sort of: The Emily calling from 227 years ahead is a clone, the third such copy made from a previous Emily and given her memories. Her's is a copy-pasted brain, and she has a long story to unravel.
Watch via Vimeo (above) or Netflix.