Is Web 2.0 Worth it?

Having read the Intro to Web 2.0, there is really no doubt in my mind that O'Reilly has it wrong. At best, it should just be Web 1.01 or something like that to highlight that the change is really just incremental at the most. The significant changes, as has been argued, are really just in the way designers are designing, and users are using, and I submit that that evolution doesn't justify the label of a whole new version.

When the web designers decided to use scripting languages like PHP to build interactivity into webpages (no doubt it started with forms, but soon expanded into blogs, which are just big and versatile forms), they probably didn't realise that they were relinquishing their monopoly on content. I'm saying nothing new here, but giving users control over the content of the world wide web is the most material aspect of Web 2.0, but only because it changed people's behaviour, not because it was a great leap forward in technology or engineering.

My grasp of where Tim Berners-Lee was headed is that he wanted a globally accessible and cross referenced database of all information. Parts of Web 2.0 would serve that objective - I'm thinking of Wikipedia here. But I can't see that he would see the rise in social networking as contributing to the goal - I suspect he would view it as a waste of time.