Chris Seems To Have Captured the Essence Here
AVATAR is a fusion of DANCES WITH WOLVES (1990), ALIENS (1986), ROBOCOP (1987), STAR TROOPERS (1997), JURASSIC PARK III (2001), and the novel DRAGON RIDERS OF PERN by Anne McCaffery (1988). In my mind, in order for a movie to be a classic it requres that ALL the elements work together and be of exemplary quality and as such AVATAR, however, does not meet that threshold.
What AVATAR has demonstrated is that live actors may not be necessary in less than a decade as the distinction between animation, special effects, and real human actors appears to be close to being negated. Such a transformation of the medium will have both serious positive and negative consequences of which is an entirely separate discussion.
The problems with the visual imagination and cultural immersion of Cameron's AVATAR is that for whatever reason, perhaps public acceptance and marketing. The hard core sci fi elements have been popularized for the general audience consumption and the true grounding of this movie is overtly human in origin, not extra-terrestial in nature. All the visuals and all the aliens have in their essence not extraterrestial characteristics but obviously earthly derivations. the aliens are humans with added size and different looking features, but are strongly humanoid with strikingly similar native-American cultural and linguistic backgrounds. The alien animals and plants are also just merely variations of earthly insects and animals on earth of which most of us can relate to the rhinos, dragons, jelly fishes, and such.
More serious flaws occur when the lead character supposedly becomes native, but the narrative continues mostly in English, whereas, with DANCE WITH WOLVES, there is a strong commitment to using the native language to promote authenticity and coonsistency with the native culture and nuance. Another technical incongruity is that continued existence or use of machine gun and bullets in the year 2154, which is somwhat incredible to believe that in more than a century, advance military weaponry hadn't advance further along with the more than convenient failure of the the enemy/millitary troopers bullet-proof windshields when the same transports convenient are resistance to such damage when the "good" characters steal one.
The storyline is, in my opinion, important and needs to be considered for any classic, for an overly simplified, overstereotypical characters as found in AVATAR are also imbalance to the rich and fabulous setting in which we find such characters. If this movie was to be a classic, the story must hold up its end of layered sophistication of plot and character as much as the detailed landscape and beauty of this alien world or else this partial "classic" will be easily surpassed by a production that encompasses in its entirety the whole theatrical experience in its surperb totality.