Eh, I meant more like phone stands and cases. Door handles as in the actual nob. Do people lean on door handles? Also, what kind of toiler paper holders do you use? I've never seen one with a spring inside. What sort of mechanism does it use?

And a low quality 3D printer is something that probably could last a few years. And if not now, then certainly in a few years time.

The thing is, 3D printing is only really getting its legs under it. In order to really revolutionise things it needs to have the proper infrastructure developing alongside it which is only happening now. Each industrial revolution not only had a new mode of production, but also a new form of energy and communication accompanying it. We have the communications medium, the internet, but the so called 'energy internet' and the 'internet of things' are just starting to emerge, and it will probably take a few decades before the whole 'third industrial revolution' is finished.

By the way, I didn't just make that up, Here's an article from the economist briefly covering the idea: http://www.economist.com/node/21553017