Roger Ebert got it right and many other reviewers, I believe, missed the point. [Click here to read Ebert's review in the Chicago Sun Times] Before I get to my one sentence review, I saw the film in 2D, for modern 3D films give me a headache, (even though I'll go see it again in 3D, just so I can say I have.) Ok, here goes. Granted, it's a run-on sentence, but it's a good one.
"James Cameron's visually beautiful film, 'Avatar' tells a very predictable but truly wonderful MYTH, that Humans have been telling each other around campfires for 10,000 years; a two-fold story, first of two warriors who fights against evil to protect their people, and second, sharing this message [told to all those people around those countless ancient fires and today, those thousands in front of numerous movie screens], that The Earth is Sacred; that all things, all people are connected; that we need to honor one another; that Nature is Holy, and that without Her, we, as Humans, will die in our hearts and in our souls." - Stu Jenks, New Year's Eve, 2009.