In 1975, if you wanted a personal computer you bought a kit for roughly $1,750 in today's dollars and you assembled it yourself. It didn't have a monitor. You

In 1975, if you wanted a personal computer you bought a kit for roughly $1,750 in today's dollars and you assembled it yourself. It didn't have a monitor. You programmed it yourself. And at the end of all that you had blinky lights that could do math. Five years later you have the Apple][, the Atari ST and the IBM PC. Ten years later you had a Macintosh. Thirty-five years later we were walking around with supercomputers in our pocket. Extrapolating the adoption of 3D printing based upon today's home kits is definitely short-term thinking. Better to consider what a $500,000 top-of-the-line Objet printer can do and imagine it in you home 15 years from now, in the space your microwave takes up.