The site points to this as why or what?

Cω is an extension of C# in two areas:

- A control flow extension for asynchronous wide-area concurrency (formerly known as Polyphonic C#):

- A data type extension for XML and table manipulation (formerly known as Xen and as X#):

Along with the other post more than likely this discovery will become C# x.x. I also read Cw as an extension to C#. Does that mean c# is needed in order to make it work and that Cw does not replace it?

I guess I will have to download and find out.