The newer display has what looks like 3 ribbon cables attached to it as opposed to only 2 on the current display. The extra cable would be used to provide the bandwidth that would be required to give the panel a Retina display, The other two cables are used for power and data transfer.
We recently reported that rumors have suggested that the screen on the Apple iPad will be an IGZO panel, produced by Sharp, which has the capabilities of producing resolution of 330 dots per inch. Earlier reports noted that Apple had invested some of its ample pile of cash into the facility that Sharp will be using to build the displays. The Apple iPad 3 is expected to launch early next year with a quad-core A6 processor running the show. The company recently denied a report that its third-gen tablet would launch next month.
source: CafeNaver via AppleInsider