Sony Xperia Z Ultra Phablet was announced in June 25th at China. The handset is coming with 6.4-inch gigantic display with all expected high-end features. Currently there is no information regarding the price and availability but the device expect to have price around 39k. Only difference you can see by comparing with Sony Xperia Z is the screen size, the name Ultra implies that.
Have a look at the Sony Xperia Z Ultra Photo Gallery