At least for the 3D printing case you may have just been too early, or the wrong market. I work at a hardware company and these days 3D printing is invaluable

At least for the 3D printing case you may have just been too early, or the wrong market. I work at a hardware company and these days 3D printing is invaluable for prototyping and other similar work. Maybe in a couple of years the same will be true for the others.