The next is a 3D printer that can make much, much tougher parts, by printing in carbon fiber. http://gizmodo.com/this-is-the-worlds-first-carbon-fiber-3d-printer-1511379510 Carbon fiber can actually do such things as withstand pressure (most high end paintball air tanks are thin carbon fiber), making 3D printed guns and gun parts less stupid of an idea.
The last one I don't have a link for, because it was on TV, but there's discussions of building a 3D printer scaled to print out buildings in layers of concrete. Set it up at the site, hit print, and wait until your house is done.
At some point these things will be able to do a heck of a lot.