It won't change the way films are made because only Cameron has that amount of money to play with (and this could well be the last time he has!). Titanic making over $1 billion gave him a free pass. So he could spend hundreRAB of millions and 3 years developing this project, a luxury no-one else has, aside from maybe Peter Jackson, and when he had that freedom with King Kong IMO he blew it. It was way too overblown. Return of the King was.
All the hype for a same old same old story and a load of CGI cutscenes. Many people just aren't enthused. We've all experienced Pocahontas, Fern Gully, Last of the Mohicans, Dances With Wolves etc. all similar stories, white man comes to take 'savages' who are spiritual people not deserving to have their land taken from them/destroyed. It's an age-old tale being retold AGAIN for the millionth time, except this time it's not native American Indians it's blue cat-like aliens from Alpha Centauri in a version of our future.