The takeaway is to watch for things that have been brewing for a couple of decades and technically mature. That is the critical moment to jump on to reap for fat benefits. 3D printers and Lytro cameras are such examples. The beauty of this model is that you skip the R&D part that is tedious, risky and slow moving, and only get the positive side of them.
3D Printers are machines that produce three-dimensional objects from digital data by printing in thin layers of physical material, similar to the way an inkjet prints in two dimensions. A 3D printer outputs not words on paper, but a thing. After a couple decades of research, development, and industrial deployment, the technology appears to be on the threshold of developing a mass market. Still, it’s hard to imagine what to do with such a general purpose machine sitting in one’s house.