While the Z Ultra's massive diagonal has become a recurring topic, the quality of the display is just as great and a topic of its own...
Source: http://www.phonearena.com/news/See-how-Sony-Xperia-Z-Ultras-Triluminous-display-stacks-up-against-the-one-on-the-Sony-Xperia-Z_id46474
Source: http://www.phonearena.com/news/See-how-Sony-Xperia-Z-Ultras-Triluminous-display-stacks-up-against-the-one-on-the-Sony-Xperia-Z_id46474