But Marx was equally emphatic that capitalism also depended upon the organized, highly social production of factorys. It was the combined labor of many workers, organized under the control of the capitalist within a context of market forces that, in my reading of Marx, makes capitalism unique. Neither markets, nor the despotic organization of production alone makes for capitalism. Rather, it is the unique combination of the two in a way that grants capitalists authority over functions that would clearly be recognized as political in any other economic system, while depriving workers of any formal rights over the product of their labor. And, yes, I am equating commodification with the marketization of goods, services, whatever.
Centralization extends the sphere of controlled production at the expense of exchange.
Though I realize that this more abstract question was not the point of your post, I welcome your thoughts and the thoughts of the list on this.