If you restrict the debate to the maker movement and people at home owning machines, I completely agree that the average joe can't own a large 8x4 3D cutter and

If you restrict the debate to the maker movement and people at home owning machines, I completely agree that the average joe can't own a large 8x4 3D cutter and never will, yet they can own a basic small format 3D printer. But the average joe is unlikely to own a kiln either and unlikely to own any form of industrial pre+post-process. Disruptive manufacturing is my main interest as well as the new models of digital distribution. I believe the home will be an extremely limited means of production, but indeed a computer controlled plastic extruder (3D printer) will be an accessible technology many can own.