This view implies that digital libraries will coexist with traditional materials for ever. In fact, history shows that new technology can drive out the old. Consider, for example, typewriters and gramophone records. Ten years after the introduction of superior technology, both were essentially dead. Where I work the U.S. mail is following the same track to extinction.
Gramophone records are dead, but the business of recorded music is essentially unchanged.
Scientific journals are in a period of rapid change. Over time, scientific journals could cease to be physical artifacts on paper, published by traditional organizations. In the computing industry, each generation of technology destroys the previous one. Current changes to the information industry are equally big. Modern technology has greatly reduced the barriers to competition in many fields.