I'm not quite sure what he Gelernter is getting at. It seems that he thinks the temporal character of information is the most crital one, and thus we can tie all information together with this unifying aspect.
I don't believe that is true.
IMHO much more likely, the web will fragment and map onto objects and spaces in a manner that best reflects the utility of the interaction. Time will be just one aspect in a number of them that will enable relavent information to be drawn up.
The most timely information has the least context.