Panasonic showed off a new tablet device at its CES 2013 keynote today. The Windows 8-based device is less than half-an-inch thick, with a 20-inch screen with 4K resolution for ultra-crisp images. The device is clearly aimed at the professional market, and a promo video Panasonic showed featured a photographer talking about how it can help him with his workflow. The tablet has pen input, and is not only incredibly thin, but also very light.