Doesn't this kind of screw the people who already bought an X360? Or can you trade in / swap your current one to upgrade?
In what way are you thinking they might be being screwed?
The current 360 still does everything they sold it as being able to do, and it'll still be able to play all forthcoming games.
Now there's going to be a revision which adds a port while locking current owners out of nothing. By giving future owners an extra connection option, how are they screwing current owners?