web 3.0

Anybody heard of this?
Apparently there's gonna be one big database and everything's gonna be organized in spaces where the user moves around much like in second life.

What are your thoughts on this and if you have any additional info on the web 2.0 please share your knowledge!

Personally I'm not to keen on this new concept of the internet because if you use a character or something similar to browse, your cookies ecc. can be easily stored and profiles can be made according to your preferences/patterns.

I see it as a lack of freedom...