Dreamworks would do that by developing movies using stereoscopic 3D, a technique that uses slightly different images, as viewed from the left and right eye, to provide a realistic depth perception. The technique itself is not new, but betting that consumers will wear glasses to watch it is. Other solutions don’t use glasses but have a lesser image quality.
Would dreamworks get an edge over Pixar? I don’t think so: when creating computer graphics (CG) movies, there are little technical difficulties to render stereo content. It just takes more time to compute. Stereo 3D is only a final step in an extremely complex production pipeline.