3D printing, once it really takes off is going to be a huge blow to the industrial complex as well as a major boost to the programming field. Just imagine having the option of industrial fabrication in your own home. Make your own toothbrushes and kiss the toothbrush factories and all the jobs they represent goodbye. This technology has the potential to drastically impact our economy on a scale greater than any of the communications tech or social breakthroughs of the past few decades. They really only improved the manner in which many industries operated, whereas 3D printing being made widely available will have the effect of taking a scalpel to industry and simply removing the need for huge swaths of it.