Image courtesy: Optyczne.
The Sony booth at the CP+ show in Yokohama is displaying Sony’s current Full Frame cameras (RX1, A99 and A7r) under a big 4K advertising. UPDATED: The Japanese text you see above the camera is just advertising the Bravia 4K TV and not advertising any new 4K camera.
But according to my sources a first Full Frame 4K camera will be announced soon and challenge the just announced Panasonic GH4.