I Want Marc Porat and his agents of change. But you say this is much too narrow a way of looking at the economic implications of the technological changes coming. Look back at the history of human economic activity. Before barter, people were constrained by their own limited personal resources and had to learn how to supply all their essential needs. Later, the creation of paper money and related systems of accounts made it easier to reach into wider markets.
Abstraction is the key.
If I have to carry my goat cheese with me and find you carrying your olive oil, the market is slow. The transaction cost of finding you, and arriving at some sort of exchange value is high. Trade can move broadly across vast distances. But, ironically, at the level of everyday consumption, most of us are still limited by physical reality. This has never happened before.