Until the death of humanity or the point at which we get molecular 3D printers.

You need a high enough intensity light at 300 LEDs per inch to knock some electrons around on a sheet of perfect plastic. Then you need a perfect source of toner, the moving the paper bit and the melting bit are the only parts we can do adequately.

To make it outside of a fabrication facility simply isn't reasonable. It's too small.

Its the same reason we're not going to be making our own desktop monitors.

The only reason they're able to pull this inkjet off is because the head is coming from a fab, we don't have that kind of precision at home to make a inkjet head.