Microsoft due to invent packet filtering?

According to some reports the worlds most popular series of proprietary systems is suffering from a severe lack of a packet filter. This is also documented at another article plus discussion.

Now apparently Microsoft will invent the idea of having a packet filter integrated into the operating system with their WPF for Longhorn.

It's really amazing how innovative those guys are ;) Did I mention that Linux has an embedded packet filter since more than a decade?