Recently, a new version of Windows 10 inside Insider test builds was discovered by The Walking Cat. This new Windows 10 version, currently known as “Windows Cloud,” is listed inside Windows 10 software development kit 15003. You will also find mention of both Windows Cloud and CloudN inside recent Insider test builds.
However, Windows Cloud version has nothing to do with Cloud, instead, it is a simplified version of Windows 10 that will only run Unified Windows Platform (UWP) apps. It will run on apps installed from the Windows Store. Which is very similar to Windows RT or the Windows 8.1 with Bing SKU. Windows Cloud and CloudN editions will be simpler, cheaper, safer, version of Windows 10 and will compete against Chromebooks.