Complementary

In the chapter "The Death of Paper (which never happened)" of the book Post-Digital Print by Alessandro Ludovico, the sentence that stood out to me the most was "paper and pixel seem to have become complementary to each other." I never thought about it like that, but today printed material is created by using pixels on a screen. Without a pixel (for the most part) you would not be able to print anything. Nowadays they're also trying to make pixels on a screen seem as real as what you see on printed material or in mother nature. Retina and HD display is about as close as they've come thus far to the reality of an image on a screen. Now 3D screen display comes to mind. I wonder if they'll ever be able to have a 3D display where you would not need to wear special glasses for? Or have it be so real that when you reached out to touch the 3D object it would have substance. You would actually be able touch it or at least the perceived sensation of touching it would come upon your hand. I wonder?...