When you read articles like that it helps to ask how much it will cost compared to doing it the "normal" way. The answer, for most things that are produced in volume, is generally "far too expensive for general consumption." Make a great demo for the printer company, though.
Think of it this way: a 3D printer is a general purpose tool; it really can't compete with individual tooling optimized to pump out millions of units of a single product. For prototypes and engineering testing, it's awesome (sometimes[1]); for mass production not so much.
[1] I have seen instances where a design engineer had to make a "hybrid" prototype part that was partially done on a 3D printer and partly on a traditional milling machine to make up for deficiencies in the 3D printer output.
Think of it this way: a 3D printer is a general purpose tool; it really can't compete with individual tooling optimized to pump out millions of units of a single product. For prototypes and engineering testing, it's awesome (sometimes[1]); for mass production not so much.
[1] I have seen instances where a design engineer had to make a "hybrid" prototype part that was partially done on a 3D printer and partly on a traditional milling machine to make up for deficiencies in the 3D printer output.