They still would not have existed had it not been for the fans of the OT. And the PT made so much money solely because of the nostalgia for the OT, fueled by cognitive dissonance. TPM set the precedent in blockbusters that you can make a profit despite a film's awfulness. When TPM3D comes out, there will be no doubt be a "critical rehabilitation" of the film, and people will go see it, thinking it is not as bad as they thought it was. TPM3D will sadly also usher in the death knell of traditional 2D films, just because of how much money it will make.