Sure 3D printers came out much cheaper (talking of FFF Fused Filament Fabrication or FDM Fused Deposition Modeling ) and much more precise/accurate, but still they are way too slow for any practical "final customer" use, outside the pure fun of it.
Other technologies are still too expensive (or again still too slow) to get anywhere soon in "every household".
In the professional world, set aside the "quick prototyping" field, and possibly a few other "narrow" fields, like jewelry and dentistry they can make "products" that either miss the mechanical capabilities of the "real" thing or that - if you can make them with suitable characteristics or materials - still cost tens of times as much as a same product manufactured industrially with more traditional means.
Basically "nothing".
Sure 3D printers came out much cheaper (talking of FFF Fused Filament Fabrication or FDM Fused Deposition Modeling ) and much more precise/accurate, but still they are way too slow for any practical "final customer" use, outside the pure fun of it.
Other technologies are still too expensive (or again still too slow) to get anywhere soon in "every household".
In the professional world, set aside the "quick prototyping" field, and possibly a few other "narrow" fields, like jewelry and dentistry they can make "products" that either miss the mechanical capabilities of the "real" thing or that - if you can make them with suitable characteristics or materials - still cost tens of times as much as a same product manufactured industrially with more traditional means.