You miss probably the major disruption that 3D printing brings to manufacturing, it turns it into a software problem. We've seen what happens when something is reduced to bits that can be manipulated by software, and now we are going to watch it happen to the physical world.

What happens when you don't just torrent a model to print, but you distribute your job to hundreds of printers? We have all seen what happens when you network a bunch of cheaper and lower quality things relative to a monolithic system, and I can see this happening with digital fabrication as well.