Don't worry if you've never heard of 3D printing. It's so new it's not on many radar screens yet.
But soon everyone will know about it. Still in its very early stages, 3D printing is destined to have a huge impact on the entire world economy.
These "desktop factories" will one day become a $1 trillion industry - completely changing the traditional factory model forever.
It's what's known as a "disruptive technology."