(a brief from a Business Week Editorial)

For nearly all of its life, the modern corporation has made money by making things. It has done by amassing fixed assets, organizing large workforces, and managing the organization in a clear hierarchy.

The 21st Century Corporation will do little of that. It will make money by producing knowledge created by talented people, working with partners all over the world.
The changes will be so fundamental that the corporation as we know will exist on the margins of the economy.