has been a while i went back to dynabook and the idea of personal dynamic media, but don't want to miss this pointer.

What would happen in a world in which everyone had a Dynabook? If such a machine were designed in a way that any owner could mold and channel its power to his own needs, then a new kind of medium would have been created: a metamedium, whose content would be a wide range of already-existing and not-yet-invented media. (1977)