PCGH has used the command console of Crysis to play the game at 6,400 x 4,000 pixels. This is possible on a 30 inch display because the Cryengine seems to downsample the game to the native resolution of the screen (2,560 x 1,600). Therefore the picture you see has 6.25x SuperSampling Anti Ailiasing. They have taken some impressive screenshots.
If you are registered at the website (free) you can download four of the shots at 6,400 x 4,000.
