Recently someone tipped me on something that is rather unique : Cornelios. CorneliOS is a virtual web based OS that runs in your web browser. now we've seen all kinds of applications ran from your browser, but this is a first, as far as I know. The application demos look very, very promising. It feels as if you are in a local application, but it is an online app. Or actually, it is a suite of apps. Cornelios is built on top of something called the cora Framework. The CORA framework is a CorneliOS technology that allows to turn common websites into web applications.

CORA uses both the CorneliOS system API (which offers common I/O features) as well as the CoSCRIPT language, which offers tags that easily allow to create dynamic content.
Further CorneliOS technologies include CorDoc, a DocBook-like XML scheme to create documentation files, and 3DVR, a web-based 3D environment. (Cornelios)

The mix between a desktop and a server environment is something you have to get used to, but it looks an feels pretty cool and comfortable.

I wonder how much time it will take before websites start emerging that are built on this revolutionary system.

Killerapps says it like this :

CorneliOS advertises it's facility of use; the combination of easy website management and a collaborative work environment may be quite tempting to those interested in open source projects and web development.