The article only mentions a few of D's features. There are a lot more improvements. The templating system for instance is quite innovative. http://www.digitalmars.com/d/templates-revisited.html Variadic Templestes: http://www.digitalmars.com/d/variadic-function-templates.htm...
But there are other things as well like the lazy evaluation, and built in contract and unit test support.
Ave a look at the articles on this page http://www.digitalmars.com/d/
And the specifications http://www.digitalmars.com/d/lex.html