See Avatar if you can. It is visually stunning, especially in 3-D.
But the script is silly and the dialogue must have been written by a sixth-grader.
This is standard Hollywood fare: Evil, greedy capitalists despoil the environment and oppress noble savages who worship Mother Nature.
But if you are into special effects, see it on the big screen. If you wait until it's on TV, you might as well skip it.