Movies and magic go hand in hand. The best magic trick is where you doesn't question how the trick was pulled off, but how awe inspired you are. The same goes for movies. Méliès was, after all, a magician turned filmmaker who used many of his tricks to create special effects for his films (You've all seen Hugo).
Alfonso Cuaron is not a Director, but a Magician and Gravity pulls of a spectacular and emotional trick.
The visual effects are…
A great performance by Denzel Washington and a return to form for Zemeckis. Even though it has a good story, it runs on for a bit longer than it should. Also, some of the mise en scène and the music choices is obvious. Otherwise, this is going to be a busy award season for Mr. Washington.