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Facebook, Uber and AirBnB have created private networks for public infrastructure which they dominate. The Web 3.0 is the antithesis of this, it's about multiple profit centers sharing value across an open network.
Web 3.0" — in his case he defines it as better content, built using Web 2.0 technologies. There have been numerous responses already, but since I am one of the primary co-authors of the Wikipedia page on the term Web 3.0, I thought I should throw my hat in the ring here.
No waste of time handling technical details at launch
No need to involve developers
Provide relevant information with forms to fill out
No need to search for the required information all the time
Create the own structure of the used data
No waste of time switching between different information sources
Copying data among spaces
Web 2.0 services like digg and YouTube evolve into Web 3.0 services with an additional layer of individual excellence and focus. As an example, funnyordie.com leverages all the standard YouTube Web 2.0 feature sets like syndication and social networking, while adding a layer of talent and trust to them.