Google just announced the Chromebook Pixel, a 12.85-inch touchscreen Chromebook with a 2560×1700 display.
Chromebook Pixel includes a 1.8GHz dual-core Intel Core i5 Processor, Intel HD Graphics 4000, 4G of RAM, two USB ports, mini display port, 2-in-1 card reader, and a 32GB SSD. Google quoted up to 5 hours of active use for battery life.

-12.85″ display with a 3:2 aspect ratio
-2560 x 1700, at 239 PPI
-400 nit screen
-178° extra-wide viewing angle