As device makers seem to be focusing on smaller tablets, Panasonic is moving in the opposite direction. The company has unviled a jumbo tablet with a 20" screen and a 4K display resolution. The Toughpad 4K UT-MB5's 15:10 aspect ratio is a little unusual, but the 3840x2560 resolution adds up to 9.8 megapixels—more than the 8.3 megapixels offered by 4K displays with more typical 3840x2160 layouts. When you factor in the screen's dimensions, the pixel density works out to 230 PPI.
http://techreport.com/news/25324/20-...force-graphics
20-inch Panasonic tablet has 4K resolution, GeForce graphics
9th September 2013, 08:35
20-inch Panasonic tablet has 4K resolution, GeForce graphics 
