Well, eventually "repilicators" WILl probably be viable.
The 3D scanners show this (saw an awesome Eagle space ship modell form Space 1999 made from Rhino, to model). Although it's a huge difference to make actual materials, such as say, stainless steel from just the raw materials, versus making a simple plastic model...it's a step.

Saw they had created carbon60 diamonds, turns out they are magentic, which should be impossible ( only a few metals have that ability). This means it maybe possible in the future, to have a
-high temperature resistant (C60 diamond burns at 1,200C iirc, which is about 300C higher than normal diamond)
-harder than normal diamond,
-incredible tensile strength (real diamonds are full of flaws, low tensile strength, C60 has enormous tensile strength)
-corrosion immune material
-that's magnetized (and this means it can divert charged particles like lethal solar radiation)..ie the perfect space craft material.

With nanotechnology, imagine a "replicator" in yor house..instead of buying goods, you shop at Amazon, see an item, buy the BLUEPRINTS, it gets made in your replicator...so no more delivery ofgoods, except raw materials. Scifi now, possible reality by end of the century.

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