Even home 2d printing isn't all that great
3d printing used to be known mainly as "rapid prototyping", it's now being used ever more for "rapid manufacturing" and this makes a lot of sense for low volume products.
Various parts of the media, from geek websites to the FT, have been putting forward the notion that 3d printing will revolutionise manufacturing by putting a 3d printer in everyone's home and allowing for decentralised manufacturing. I don't see how this is even remotely plausible.
I always think of home inkject/ laser printers when the notion is put forward. Would anyone seriously consider printing and binding a book at home to be preferable to ordering it online and having it delivered the next day. Consider the cost, time, reliability and hassle. Even for a custom book you would still be better off going with something like blurb.co.uk (think about the difference in quality, TCO and cost of you own time). And this is with technology which is fundamentally a lot simpler to 3d printing and has had decades to mature and become dirt cheap.
I can imagine industrial scale 3d printers, which would be the equivalent of the printing machinery used by the likes of blurb, being used more widely for spare parts and such but the notion of it being done at home seems fanciful to me.