This projection technology doesn't actually change the way the movie is made though, right? And it's up to the movie theaters to have to upgrade their equipment for general 3D, so I don't know what this specifically has to do with Avatar besides James Cameron trying to find a new gimmick to push another Avatar movie onto a now largely indifferent audience.
Personally I think this type of 3D is going to fade away in favour of other technologies, and I have no interest in watching a movie in present day 3D, hence the fact I never bothered to watch the first Avatar, and don't plan to.