"The Matrix Revolutions" is not a vast improvement on the mediocre first installment in the series. The only thing that saves this one, like the first movie, is the spectacular special effects.
This time, the machines attack the human resistance in their on proverbial backyard -- and almost destroy mankind once and for all. However, the biggest problem for the machines and humans is "Smith" (Hugo Weaving), a program created by the machines that has grown stronger and more dangerous to mankind and machine.
The acting is better in this movie, but it is still not perfect. I just could not believe any performance.
Another problem with the characters is the development of the ones introduced in this movie. You don't learn anything, if at all, about these people.
The first movie was shot with a much darker tone than this one. Although grays and blacks were heavily used in everything from scenery to wardrobe, there was much brighter lighting in this movie.
You have to be a fan of the trilogy to enjoy this movie -- which I am not. It could be a lot better than it is.