Si parla tanto di Web 2.0 anche se in realtà non esiste una vera e propria definizione per questo fenomeno.
Eppure c'è già chi intravvede segnali che fanno pensare alla sua fine:

http://blog.drinsama.de/erich/en/200...ld-2.0-is-near

Sinceramente su alcuni punti mi ritrovo completamente d'accordo con l'autore:

Many of the web2.0ish stuff is just pretty graphics with no real use. How many of the tag clouds you see are actually useful? On the contrary, how many of these new sites have accessibility issues?
Content issues - I've heard of child *****graphy been uploaded to e.g. MyVideo (a YouTube clone popular in Germany, since it's doing huge advertising and is on TV), and them taking multiple days to remove it. I wouldn't be suprised if that happens with YouTube as well, but they probably are faster in reviewing and deleting such contents.
Security issues - Javascript and webbrowsers aren't well-suited for writing reliable and secure programs. Face it. We're already seeing the first attacks on the Google API, expect much more of these attacks to surface. I wouldn't be surprised if spammers already make heavy use of such APIs to harvest email addresses.