From the intro to Zac's lengthy piece:
Microsoft is now hard at work on the next feature update for Windows 10, codenamed 19H1 and scheduled for release this April. This update is expected to include yet more changes, new features, and further UI refinements and improvements. Development of this release is almost at the halfway mark, meaning it shouldn't be long now before 19H1 is marked as "feature complete" internally and a focus on fixing bugs before release begins.
- A new light theme is available which turns the taskbar, Start menu, and other areas of the Windows Shell white.
- Shadows are now present under several UI elements in including XAML context menus and window popups.
- The login screen now features Acrylic blur effects.
Good stuff. I maintain four Windows 10 PCs around the house and office here, and I try to keep a spread of branches - just in case I need to double-check something! In the meantime, go have a read of what's coming up, since 19H1 is now nearly 'feature complete'.
Mobile users can only stand on and wish that Microsoft hadn't canned the Windows 10 Mobile feature builds when they did, of course. Oh well - at least the kernel and core APIs are still getting bug fixes.