If you haven't seen Interstellar, you should, and if you haven't seen it... Spoiler alert!
The movie was a fascinating look at what the future could be like if agriculture takes a turn for the worse and we have to come to terms with a world that can't sustain our population. Then it goes medieval on your ass with a whole lot of complex space and time shit that kind blows your mind. Not that we haven't heard about this kind of stuff conceptually, but it's pretty crazy to watch a movie with a plot based around these concepts.
If you have seen it, you will really, really appreciate this Honest Trailers take on Interstellar. Check it out.