The book takes what is, at times, a comically breathlessly enthusiastic view on how the future is being changed by a culture of mass collaboration, but I don't personally feel that the shift is quite so fundamental as is being indicated. On the whole, it's an entertaining read, but more for the concrete examples of mass collaboration in industry rather than the central thesis of the book, which is 'Hold on to your hats!'.
Some of the examples of mass collaboration cited as fundamental paradigm shifts strike me as incremental shifts at best - chief amongst these, the example of GoldCorp who opened up their geological data to everyone and as a result netted a huge windfall of information that led to the identification of new, rich seams of gold in a mine that was about to be closed. It's interesting, yes, but I feel nothing revolutionary. The GoldCorp situation says more 'competition' than 'collaboration' to me - effectively GoldCorp ran a competition in which they said 'Find us some gold, win a prize!'. None of the mechanisms that lead to mass collaboration as a genuinely new phenomenon are present in a number of the examples given.
The book is sparesely sourced, but contains interviews (or at least, soundbites) with a number of very prominent figures in the computing industry and other areas. Some of these people are pioneers in some of the emergent ideas that, in my opinion, indicate collaboration as a paradigm shift.