IMO even when (if) we will arrive in the 3D printing industrial era we will remains for decades in "standard" society simply because even if we push 3D printing to incredible level becoming able to print nearly any kind of artifact we use daily it will still be an expensive slow process respect of a dedicated machinery.
Perhaps in a far far (and hypothetical) future when we will have easy and powerful 3D parametric CAD systems with fully interchangeable formats, with built-in CAE easily accessible to nearly anyone at least for basic simulation, with a so advanced machining that we can simply drop our part in a directory and the software take care to suggest material we need and auto-produce it we will see a new "modern era" of personal development. And this future is unlikely for many thing, industrial control is one of them: if we are able to produce really "individually" anything we are free. Too free for actual ruling classes. We can produce positive innovation that impact some rich&powerful business, we can produce weapons, we can innovate in unwanted directions etc.
Remember formally in the western we are citizens in democracy, but that's formally, a results of our ancestors fights, that was never really complete and vanish more and more every days.