Technology will never replace print, for humanity has never rid itself of any method of recording knowledge. CDs and DVDs (and LPs, too for that matter) are just updated versions of cuneiform tablets for example.

Besides, electronic data is noways permanent. Run it past a magnetic field or heat it too much (and below the burning point of paper) and your data is history. And it changes -- try to read an old 8 inch floppy, or a 5.25 inch floppy, or an 8-track tape, or a wax cylinder, or a dictaphone belt and you'll see what I mean. Too much data is stored in too many formats and we are losing easy access to it.