Sixth sense and Web 3.0

I've been fascinated by the social technologies out there for some time. Wondering which direction they are going in and watching as community forming sites such as facebook and twitter are on the rise. Whilst these are generally known as Web 2.0, it's Web 3.0 and beyond that is interesting. It's difficult to explain to people what convergence of technology could do (good and bad), but here is an example of a futuristic view of Web 3.0.

http://www.ted.com/index.php/talks/pattie_maes_demos_the_sixth_sense.html

Of course as information (formally a strong hold of power bases such as the USA) become more widely available, how will the governments around the world seek to control, manage and censor what we see and know. There already loads of examples of the US, China and Australia blocking access to materials that their governments do not like - I wonder when this will extend to the personal, community and social technology world.