As definições e as características da próxima forma da Web ainda estão em discussão. Os conceitos de Web 3.0 e Web Semântica têm sido discutidos, mas até ao momento ainda não há um consenso geral.
Encontrei há uns tempos um texto de Alex Iskold sobre este assunto intitulado "The Structured Web - A Primer" que merece uma leitura muito atenta:
A critical piece of the next web evolution is the introduction of structured information. This concept is so basic to us as humans, that we completely overlook the fact that it is quite foreign to computers. When a person looks at a book on Amazon, she sees a book, with the author, ISBN number, publisher and the publication date. To a computer that page on Amazon is nothing more than a bunch of HTML. Increasingly, information on the web is becoming more and more structured. This process is happening via several major movements:
* The rise of APIs
* The proliferation of vertical applications that run on top of existing data
* An increase in classic Semantic Technologies and Microformats
* The spread of RSS as an information delivery mechanism