Watching glasses-free 3D on a TV is no longer an outlandish concept, but that hasn't been true for movie theaters. How are you supposed to create the same parallax effect for everyone, whether they're up front or way in the back? Researchers at MIT CSAIL and Israel's Weizmann Institute for Science finally have a practical answer. Their Cinema 3D tech creates multiple parallax barriers in a single display, using lenses and mirrors to deliver a range of angles across the whole theater. And unlike previous attempts at large-scale glasses-free 3D, you don't have to take a hit to resolution.