Very cool technology in both the manufacturing and in the detonation rocket.
I've been interested in 3D printing for decades, and always felt it'd revolutionize a lot of industries, if not all of them. At some point, once speed, costs and materials all match up, I suppose it's possible most manufacturing will be printed.
Outside of medicine, one of the industries that I've always felt would benefit is auto parts. One day you won't have to wait for a part, especially plastic or electronics (sensors, etc.) -- you'll just call Advance and they'll print it in the store. Saves on inventory, and as long as there's a (correct) file for the part -- regardless of the model or make -- you'll always be able to get it.
If I had the money or the time I'd try to get that started...