Most of the changes and improvements here are focused around the memory card, bringing user experience improvements, ability to move apps to and from the card and more. (androidcentral.com)
General user experience improvements in build 10158 include updates to Continuum's Tablet mode, new gestures in the Start menu, navigation tweaks, and changes to the way the taskbar notifies users of file transfers and apps seeking attention. (techspot.com)
This new Windows 10 Mobile build also includes a range of user experience improvements, including updated icons and visuals, Start screen improvements and bug fixes, a near - final build of Cortana, and performance improvements throughout the OS. (techspot.com)