Here is the explanation of Web 3.0 concept.
The slides summ up the main differences between Web 1.0, Web 2.0 and Web 3.0.
Web 1.0 – That Geocities & Hotmail era was all about read-only content
and static HTML websites. People preferred navigating the web through
link directories of Yahoo! and dmoz.
Web 2.0 – This is about user-generated content and the read-write web.
People are consuming as well as contributing information through blogs
or sites like Flickr, YouTube, Digg, etc. The line dividing a consumer
and content publisher is increasingly getting blurred in the Web 2.0
era.
Web 3.0 – This will be about semantic web (or the meaning of data),
personalization (e.g. iGoogle), intelligent search and behavioral
advertising among other things.
“Semantic” and “Individual” are the key words.
Web 3.0 Concepts Explained in Plain English (Presentations)