During the unveiling of the Surface Neo, Microsoft also showed off an early build of Windows 10X — a Windows 10 version that is tailored exclusively to take advantage of dual-screen devices. Windows 10X will allow users to run regular Win32 apps while also offering new ways of interacting with apps that are designed for dual-screens. Windows 10X will be available next year on the Surface Neo and similar devices from Asus, HP, Dell, and Lenovo.
https://www.notebookcheck.net/Windows-10X-A-Lite-version-for-Windows-10-for-dual-screen-devices-sans-live-tiles.436791.0.html