Sony will release an upcoming 5-inch tablet / smartphone hybrid device, the Sony Xperia Z. This gadget is previously known as the Sony Yuga and is suppose a highest-end smartphone from this company. 
The Xperia Z smartphone is comes with both water- and dust-proof case. This smartphone measures 139 x 71 x 7.9 mm. Covered by OptiContrast technology, the Sony Xperia Z will brings a 5-inch Full HD 1080p touchscreen display with 443ppi.
Moreover, this feature will delivers high contrast levels, vivid colors, and more. The Sony Yuga / Xperia Z smartphone is powered by a 1.5GHz quad-core processor paired with Adreno 320 GPU and runs Android 4.2 Jelly Bean OS. Other features on Sony Xperia Z / Yuga are Bluetooth 4.0 and a 12-megapixel rear-facing camera.
Source
Sony Xperia Z / Yuga smartphone with 5-inch OptiContrast screen, quad-core CPU, Android 4.2 OS
Sony Yuga expected to come available as the Xperia Z
Sony Xperia Z and Xperia ZL quad-core Android Jelly Bean smartphones gets officially [video] | GadgetFolder.Com
Jan 8, 2013 -
[...] has officially unveiled two smartphones at CES 2013, namely the Sony Xperia Z and the Sony Xperia ZL. Reportedly, the Xperia Z is actually Sony’s first smartphone to have [...]