There is physically no way to bring a true 3D look to older content. The movie was shot 2D, and there is no depth information. The only movies they could possibly convert, are the computer animated ones that were rendered. If they have the original 3D frames before they were rendered out, they can use this, since there is 3D info(Poser, After Effects, etc). (Movies like Toy Story, Ice Age, etc.) But I don't think studios keep this once it is rendered out to 2D for film/tv viewing. That's a lot of digital storage to keep around. For example, a movie like The Matrix...If they had the special effects renderings still available, they could go back and make that 3D. But the rest of the film with the actors would only be 2D.