Okay, let me just be the first to say that the term "disruptive" is starting to become a more annoying buzzword than "Synergy" and "Paradigm" ever were.
No offence, just do the people writing these books even really know what they're saying anymore?

That said, 3D printing (additive manufacturing in general really) isn't going to tear down the big businesses unless the big businesses somehow lost their ability to adopt it themselves.