No more saying can be said about this. I truly respect Cameron's vision and idea, and I like (always like) the way he does things.
My only complain (and, I have this right at this point) is the story, wich is obviously very predictable. I'd had change some things at the end, but at least it made sense. Avatar is an intelligent crossover with different kind of movies, but it delivers. Sad the masses need this kinda of naive flicks to pay attention to what we're doing to our home, the earth, and to us.