Arrival! I know it was released in 2016, but very late in the year and it really stuck with me ever since.

The premise is just so exciting, and like crypto technology its not about guns changing the world(s), but communication.
The idea of the film goes something like this:

ok, so the aliens are here, but they are actually NOT trying to take over the world, but are trying to communicate.
A scenario for which presidents and generals around the world are not prepared for.

Besides epic shots of giant beatiful monolithic space ships and crazy aliens, it also offers a completely unique view on the subjects of extra- and intra terrestrical ways of thinking through the scope of linguistics.

Really guys, go watch that movie! Its good.