[jononor]

That most people just print ready-made trinkets from Thingiverse that they don't really need is hardly an issue with the machines. Most useful things around us made of plastic can be done on a 500 USD FDM 3d-printer (which is a lot of stuff).

I've fixed our commercial (China quality) lasercutter using parts made on a cheap FDM 3d-printer. Fixed powertools like drills and drill-presses. Replaced parts on my bicycle. Made functional scissors, and a haircomb that I needed when no shop was open.

The issues are that for commodity items, in the first world, it is quicker to just buy them (if we don't have them already). They will also be prettier. Or if it is a custom item, one has to actually design&test, which is something that requires CAD skills and some hours of work. Teaching this will take some time.

Most people just watch kitten-videos and play Farmville using their Internet-enabled devices. Does not mean the devices are low-quality and cannot be used for useful things.

[cptskippy]

3D printers are impractical for household repairs but I really think 3d pens like the 3Doodler are missing an opportunity here. I bought one with the original Kickstarter and we played with it for a while before putting it back in it's box and forgetting about it. A couple months ago I came across it and decided to try and fix the broken castor on a dehumidifier. The part was way to complex to be worth modeling in CAD for the amount of inconvenience it presented but it was ridiculously easy to weld the old part back together and reinforce it with the 3Doodler. Since then I've been using it in conjunction with an old soldering iron to fix things that I just don't trust glue to hold.