Apple is planning an update to its pro lineup that would include only its second LED-lit Cinema Display, a pair of sources noted today. The company should break out the display from the 27-inch iMac into a discrete model with the same 2560x1440 resolution and image quality. AppleInsider claims Apple had wanted to release the screen earlier but had to wait until the 27-inch panel dropped in cost; the iMac helped improve economies of scale.