The best thing about 3d printers is the boost it has given to kids learning useful things. It’s almost like back in the days of science fairs.
3D printing will eventually take its place among the other manufacturing processes, but it is no going to replace them significantly, except in a few niches such as prototyping. You can mold a part in a fraction of a second; printing can take hours. The technology may take off in the micro manufacturing realm, dentistry and medicine, etc.
There are fifty year old pictures predicting 3d printing of habitat structures on the Moon...
You left out cooking- I heard that you can now 3d print your dinner- the article may be on wired dot com