Windows 10X is a streamlined version of Windows designed to be compatible with foldable and dual-screen devices. Microsoft is planning to release it in the ‘holiday 2020’ with Surface Neo. Microsoft has also highlighted how existing apps can be modified to work on three dual screen patterns including Windows, Android, or the Web. The company is also releasing a new Windows 10x Emulator that can be used to develop apps and test them in the new OS. Microsoft also revealed a new feature called the ‘Wonder Bar’ that is shown on the lower screen that includes a virtual touchpad.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-reveals-more-windows-10x-details-heres-what-we-know/