While the focus is on the "optimistic" side of new technology development, the ethical and pessimistic side also comes in play. Programmable matter sounds great when we talk about assembling the tool we need right when we need it. However, if a hacker could cause the matter to suddenly transform into a destructive weapon, we could be in big trouble. Similarly, what if that new "smart limb" could be controlled by an external party. Robotic construction could eliminate many of the good blue collar jobs, leading to greater income inequality. Synthetic biology could result enable all sorts of terrorism opportunities. And interfacing a brain with a computer? Well, it does not take much effort to think of the negative possibilities there. This book would be a great source for all sorts of science fiction scenarios.
Some of the technologies described in the book will probably never become a significant part of our lives, while others will gradually seep into general acceptance. However, guessing which ones will make it is a difficult task. Lets just hope we don't cause a disaster by rushing too fast into the "wrong" technologies.
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