The Economist writes about what Tim Berners-Lee thinks:
Although he is somewhat sceptical of the hype around Web 2.0, Sir Tim is excited by three other areas of the web’s development: its spread to millions of new users via mobile devices, the growing interest in the technology’s social and political impact and the semantic web, in which information is labelled so that it makes sense to machines as well as people. If you look at the number of internet-capable mobile phones, PDAs and so on, they are rapidly outnumbering the things we think of as computers, he says. As the price of these devices falls, large parts of the developing world will get web access. When you have a large mass of new users, you will get many new applications, written by people with other needs.