Call me pessimistic, but I suspect that the 'Maker Revolution' could bring us a level of legal madness that is far beyond what we have seen in copyright over the past 20 years. Plans for 3D printing are not only copyrightable, they are subject to patent law. That, and the potential for creation of contraband with 3D printers may lead to online clearing houses for designs that you make and print at home, or strict leg…
I expect that the reaction of the Manufacturing industry's reaction to small-scale Makers will parallel the Recording/Movie industry to file-sharing, as the situations are similar in many regards.
It's very likely to happen, and it'll suck, but like you said, hopefully we get legislation through in time to protect some of the small Makers so they don't get sued into oblivion by the future-RIAA.