Couple years we’re gonna see the dawn of personal manufacturing?

Quote In a couple years we’re gonna see the dawn of personal manufacturing – build yourself a makerbot right now to get a feel of what’s coming. It’s opensource.

From personal resin extruders it’ll probably follow with mainstream laser sintering machines – those can even make actual steel parts. We’re a couple years away from seeing a fully self-replicating machine (google RepRap for some pointers on where we’re headed).
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how will macro – printing help us? What is this? And does this use nanotechnology ?