Eventually I could see it. I think 3D printing is one of those revolutionary technologies that will blow us away in the coming decades.
People need to seriously, truly try and use their brains in this matter. Just because a little plastic thingy can be made now on a $1000 printer doesn't mean it will always be like that. In time they'll be able to print on multiple materials at lower prices within the same creation. If a 3D printer could combine plastic, ceramic, alloy, circuitry, etc. it would be an inexpensive and wildly powerful manufacturing device. It has the potential to make import laws and control of devices incredibly difficult for the government. Already some company has 3D printed a 30 round magazine. These things can already also create titanium components. Imagine printing your own machine gun? It's not at all far-fetched an idea.
I believe this technology, like autonomous cars, has a very real potential to change how we live in a large way. Some people can't dream and cannot expand their view of what this technology can be, however.
3D printing is a new technology and yet already for a grand anybody can now create virtually any 3D object from plastic. Resolution is getting better via different printing approaches (there are many kickstarter projects, for example).