I understand why some people were reluctant to go see Avatar. The story is derivative (someone called it "Dancing with Smurfs") and the dialog could have been written for an 8th grade writing assignment.
But visually, it is nothing short of a masterpiece. It's a must-see (only on the big screen in 3D, though) if you want to glimpse the future of three-dimensional visuals. Warning: watch it stoned at your own risk.
Also, the music is quite good. Lots of Omnisphere in it.