When the web came along we first had HTML, JavaScript and PHP. What you could do with these languages was so primitive, they weren't even called web applications. You could create forms and when a submit button was pressed, all the data was sent to the server where a program written in an entirely different language would process the results, recreate the page (or a new page) and send the entire thing back to the browser. This was web 1.0. AJAX brought an incremental improvement to this process where pages could be updated rather than replaced. Web applications became more responsive. This was called Web 2.0.
But web 2.0 applications are just a mishmash of files and languages. Because there are so many technologies, learning all of them is difficult and building applications with them is time-consuming and expensive. A web developer told me yesterday that it's very difficult for them to find developers. Candidates might know two of these five languages/technologies needed but rarely do they know all five (HTML, CSS, JavaScript, PHP or Java and AJAX).
Web 3.0 is supposed to bring real applications to the web. REAL Studio Web Edition provides a level of abstraction that allows developers to build apps quickly and easily, concentrating their efforts on what makes their applications unique. REAL Studio Web Edition really is web 3.0. It is finally here.