Instead of creating a casing and then laboriously filling it with electronic circuit boards, components and switches, the plan is to print a complete and fully assembled device.
The trick is to print layer upon layer of conducting and semiconducting polymers in such a way that the circuitry the device requires is built up as part of the bodywork.
When the technique is perfected, devices such as light bulbs, radios, remote controls, mobile phones and toys will be spat out as individual fully functional systems without expensive and labour-intensive production on an assembly line.
Three-dimensional printers are already valuable tools for making prototypes of newly designed products. They deposit layers made from droplets of smart polymers, which gradually build up into 3D shapes. Such printing techniques have become so sophisticated it is now possible to print working prototypes with mechanical parts that move as they would in the final product.
Maybe it was growing up watching Star Trek all the time, but I have seriously been waiting for when this would be possible beyond the 3D Prototyping stage (which is cool in itself.)
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.