From Wikipedia
WQXGA (Wide Quad eXtended Graphics Array) is a display resolution of roughly 2560×1600 pixels with a 16:10 aspect ratio. The name comes from the fact that it is a wide version of QXGA, which in turn has four times as many pixels as an XGA display. As of 2006, there are still very few devices that can render images at such high resolution. The 30" Apple Cinema Display is one such device. Another is the Dell 3007WFP, a 30 inch monitor from Dell, released in January 2006, which will be in direct competition with Apple's high end monitor. (In marketing materials, Dell expands the abbreviation to "Wide Quantum Extended Graphics Array".)