5. Sharp IG ZO
Among the first major vendors to offer a 4K commercial display is Sharp with its PN-K321 Ultra HD monitor, which pumps a dazzling 3,840 x 2,160 pixels. It uses Sharp-developed indium gallium zinc oxide (IGZO) technology, a thinner active layer that allows more light to pass through more densely packed pixels at faster refresh rates. The Sharp PN-K321 lists for $5,250.