Jonathan Zittrain is an American lawyer and academic currently based at the Oxford Internet Institute. I have heard him speak several times and he is a lively and witty presenter, but sadly his book is a dull read due to its legalistic style. The 246 pages of main text are dotted with no less than 835 footnotes gathered into 80 pages at the back. This is a man who, when he mentions a web page, records not just the date but the time that he last visited it.
His main theme - which he repeats endlessly - can be simply stated. In his words: "The future is not one of generative PCs attached to a generative network. It is instead one of sterile appliances tethered to a network of control".
The personal computer and the Internet are open and flexible systems (he uses the word "generative" all the time) which have enabled an incredible flowering of innovative products and services from a multitude of sources. However, the very openness of the PC and the Web have exposed then to a whole variety of threats such as hacking, viruses, spam, and a host of malware.
In the face of such threats, the temptation will be to 'lock down' such systems that that they can be controlled more tightly. So devices increasingly will be "tethered" to limit what they can do (for instance, smart phones like the iPhone or PVRs like Sky+) and the Net will attract the attention of governments and regulators who will endeavour to limit what we can access and do on-line.
To stop this undesired future, we need to find ways of tapping into the co-operativeness and ingenuity of users themselves to find flexible solutions that may not be perfect but work - such as the controls that make Wikipedia operate so well.
Zittrain is incredibly knowledgeable and immensely insightful (his chapter on privacy is especially challenging), but his basic message is repeated and reworked so often, his solutions are so varied and diffuse, and the language is so opaque and legalistic than ultimately the book is a disappointment to the general reader (as opposed perhaps to a law student or IT geek). In any event, it is not clear that what Zittrain calls generativity is overall on the decline or that we have to chose between generative and tethered devices as opposed to selecting a mixture of items for different purposes and roles.