Arrival is a different Alien coming to Earth movie and it was probably one of the best ones I've seen so far, along District 9. It's a thriller and not a horror film and the main plot revolves a lot around how to establish a meaningful channel of communication with the foreign visitors, which is exactly what makes this movie so interesting.
For everybody who's just a bit into languages, the movie will be interesting. It's bundled with some very high grade cinematography and very pleasant to watch.
International politics and trigger happy military leaders play an important role in the movie too and how the world in general would react to such a powerful threat.
I really liked it, give it a watch, even though you usually aren't into Aliens.