Andrew Odlyzko's "Content is not King" finally reminded me that the critical difference in revenue is the change from broadcast (publication) to interaction. Not just interaction between a broadcaster and the audience (talk radio, letters to the editor) but a wholesale change from that dichotomy to everyone having the opportunity to be both or either. His example:

The primacy of connectivity over content explains phenomena that have baffled wireless industry observers, such as the enthusiastic embrace of SMS (Short Message System) and the tepid reception of WAP (Wireless Application Protocol). Combined with statistics showing low cell phone usage, this also suggests that the 3G systems that are about to be introduced will serve primarily to stimulate more voice usage, not to provide Internet access.

I disagree with the second conclusion, data connectivity will be an important part of the result.