I made an analogy between railroads and operating systems, not because I think open source is 'revolutionary,' but because it is progressive. Moving something that ought to be public from the private sphere, at the expense of its nominal, rich owners, is a progressive reform. As such, it will help other capitalists make money, among other outcomes, as many here have pointed out. But that doesn't mean it's a bad thing. Anything that helps the economy grow is going to enrich those who own capital.
mbs