Google Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways Googlebook is a new device line coming this fall. It merges Android and ChromeOS for smoother phone-to-laptop use. Chromebooks aren't going away anytime soon. Google has announced an all-new laptop lineup, called Googlebook. Yes, you read that right -- the new product category is a step up from the Chromebook in terms of performance and features, merging ChromeOS and Android into a single operating system. This new, unified OS is a risk for Google that could potentially pay off big. Chromebooks already had integrations with Android smartphones, but Google says the new operating system will bridge the gap, bringing MacBook-like features to Googlebook. Details are sparse, however, as we're expecting more information to be unveiled at I/O, Google's developer conference, on May 19. Also: Windows rivals to MacBook Neo are here - but I'm more excited for Google's response Googlebook enters the laptop market at a crucial moment.…