Texts were fossilised and standardised by the act of printing. Postmodernity celebrates the reader. Texts are again seen to be slippery, even if their words are stable, meaning slides. Yet the codex resists the reader, always threatening to restore the author's program. Hypertext linked documents begin to restore control to the reader.
Hypertext enables post-modern reading.
Yet like all the best untruths it points in significant and true directions. Many things are better shown than told, or heard than read. It is not, however, merely pragmatic advantage which suggests that a post-modern commentary will use multimedia. Multiplication of media allows multiplication of semantic possibility even to the linguistically challenged. The phrase comes I believe from Peter Berger, I think from The Sacred Canopy.