CF cards are maxed out and the only way to improve is to go dual XQD cards. That is why I didn't feel any itch to buy a D4 already.
To you guys who ask for wider AF points realize that it is not possible today? The D4 has the same spread of AF points as all other 35mm frame cameras. In fact they might be a little wider. BTW, they are in the SAME spots as on the D2X etc. They just wouldn't work if they were farther apart from the center.