A "simple" story from Nathan Torkington, without hype & buzzterm bias (p. 7) ...
1. Applications have moved to the web. This frees companies from having to ship executables around the world on discs.
2. These web applications, from Salesforce to Gmail, have evolved richer interfaces to resemble desktop applications.
3. These applications are built with the intention of letting individuals and companies access and manipulate their data without the data being forced onto the same hard drive as the application.
4. That data accessible via the web isn’t merely unlocked from a particular hard drive; it is now available from any device with a connection to the net.
5. Because the applications are served centrally, developers can continuously improve their applications and enjoy a competitive advantage from doing so.
6. Because the data used by these applications is stored centrally, rather than on a particular device, developers can use aggregated data to make applications better for all comers. Web 2.0 moves the focus from someone else’s application to your data.