C# 3.0 XML Generics Again

Now I am certain it was a joke! MattWar made a comment on his blog post and one of his XML Generics examples' implies that a generic can be defined from an XML Schema.

If it is not a joke, I don't really see the point. The type is an XML schema that has to be defined in the code. Why not just create a class? If the type was based off an XML schema that could be streamed into then that might be interesting.