Man I saw this new type of 3d printer demoed and I tell you, I think plastic manufacturing will become a thing of the past in 20 years or so. It's one of those where you fill a tray with liquid resin and a uv light cures it, but they've managed to control the oxygen level in the vat as well to the point of where there aren't any layers.... it's just one piece... and it can be printed with structural grade plastic in about 15 minutes for a 5"x5" piece.
I honestly thought 3d printing was a dead end, but after seeing this I could see plastic widget kiosks right next to the photo kiosks at your local Walmart.