3-D printing, and the DIY "maker" movement generally, are fascinating to me, even if because they get no coverage in our famously free press. This is an excellent survey article, and here's a random sample:
The current developments in 3D printing and digital desktop fabrication technologies are opening novel ‘spaces’ for fabrication to occur. For example, as 3D printers drop in both size and price, they are becoming more common in homes, schools, and small businesses, potentially transforming those spaces into micro ‘factories’.
I would love to be able to fabricate no-longer-manfactured parts for "this old house." Things like faucets or doorknobs or hinges where I have one or three or six examples, and just need one or two more, so I don't have to degrade the fabric with some cheap-ass and cynically engineered replacement specified here, manufactured elsewhere, and sold to me at the tip of the global supply chain.
Alas, I don't see 3-D faucet replacements being made from plastic powder any time soon. Prove me wrong, please!