There was one more thing I wanted to mention in my 3D printing article but neglected to include.
3D printing has transformed physical objects into information technology. What does this mean? Since any item that you may wish to print can be expressed as a digital file, you can manipulate them like a digital file. For instance, let's say that you've just designed a guitar. But rather than print it out, you can email it someone and they can print it out (sans the strings). Emailing musical instruments; how cool is that?
Or maybe you want to bring your guitar with you on your vacation, but it doesn't fit in your luggage. Keep the file on a flash drive and carry it in your pocket instead! Then when you get to your destination, find a 3D printer (they won't be so hard to find in just a few years) and print it out there. Problem solved.