You make some great points chrisclerc.

I believe that the real need is for metal 3D Printer that comes with something that allows you to recycle metal to use for printing. Imagine, having a device that could crush down soda/beer cans and make things with that aluminum. Or how about something that allows you to melt down soup cans, or old jewelry, or nuts and bolts? This is when average people will go out and buy a 3D Printer. No cost to print stuff at home will be the major turning point in the 3D Printing industry IMO (other than electric usage, which is minimal).