Movies are naturally suited to focus on the future.
Humans can focus on the future,
A quality we have distinct from other animals,
(Do Ants Dream About the Future?)
Prophecy is a huge part of humanity's spirit.
It's one of our aesthetic virtues.
Therefore, movies - being the highest expression of aesthetics in the 21st Century - are naturally suited to focus on the future.
By focusing on the future, we can picture where we're headed & bind hope (or despair) with these visions, while at the same time examining the essence of our present day actions.