First off, I've been absent for awhile so if this topic has already been made, I apologize. I searched and it didn't come up so...
3D Printing! I was just introduced to this new form of technology and was amazed. Basically there is a printer that can print 3d real life objects and make an exact replica.
Link In this video they copy a big wrench and it prints out an actual wrench. Same size, same functionality. No it's not made of metal when it comes out, but they could do that in other videos I've seen.
I personally think this is just the beginning to something incredible. And if I ever owned one, I could never be bored again.