It’s only in the concept stage, but Panasonic’s 20-inch tablet has still turned a ton of heads at CES 2013. The company’s 4K tablet prototype boasts an amazing 3,840×2,560-pixel resolution and 230 pixels per inch on its IPS LED-backlit LCD display. Clocking in at 5 pounds, the monster tablet is fueled by an Intel Core i5-3427U processor, Nvidia GeForce graphics, 4GB of RAM, and a 128GB SSD. A high precision digital pen is also part of the package, and Panasonic says that pen, with a resolution as high as the panel itself, enables natural handwriting on the massive 20-inch screen. That screen is also less than half an inch thick, by the way. No word on pricing and availability yet, but this device is being targeted at industry and professional users.