Google’s play at the laptop market with its Chromebook lineup has worked out pretty well so far, but the company may be preparing to take Chrome OS to the next level with an upcoming update. References to a new Athena window manager spotted on the Chromium issue site suggests Google could be preparing to unveil a touch-friendly version of its Chrome-based operating system. Athena would replace Ash, the two-year old Chrome OS windows manager, which works well enough on regular laptops but isn’t really optimized for touchscreen devices. Based on a handful of clues spotted by GigaOm, the next version of Chrome OS could include a card-based interface like Google Now, a new home screen called Ares, and a Surface-style split screen mode called “overview.”