I thought the movie was great in that it was something new in a very stale Hollywood of re-runs and dredged up 'old' stories like marvel comics.
In truth, the plot was based upon the Pocahontas legend.
It was pro-environmentalism. Which is ok. But also Anti-Militarianism. Which didn't go down to well with a lot of 'powerful' Americans and thus it was quite coincidental that a movie that earned the industry something like .05% of what Avatar made got the nod at the Academys.
Yep - The Hurt Locker. To me a boring 'episodal' piece of Military propoganda if ever there was one. Coincidently directed by Cameron's Ex-Wife.

I found the movie 'visually' great - a real work of ART and I enjoyed it for what it was. The plot was tame, but you wouldn't want to over-complicate the audience to much with such visual newness and a intricate plot.
I always find Cameron's movies 'Daring' in that he likes to break new boundaries with film making. Hell, he even beat that aviator Richard Branson in a race to the bottom of the Mariana Trench (13km underwater).
Think of a people who farm and garden and then suddenly have the military kick you off the land for something else that another group of people want like 'gold'.
...its a movie about someone being mugged by someone else.
***** Stars

...loved those bioluminescent scenes. I have a black-light blue for my daughter.