Microsoft initially started bringing Fluent Design elements to Windows 10 with first party apps like Calculator, Mail, etc. Slowly they expanded it to few parts of Windows Shell. With today’s Windows Insider build release, Microsoft is bringing to several new places across the OS. With Windows 10 Insider Preview Build 17063, Start and Action Center support acrylic to align with Fluent design principles.
Microsoft is also applying acrylic to the taskbar, Share UI, Clock and Calendar flyout, Network flyout, Volume flyout, and Input flyout. Microsoft also noted that the acrylic background is disabled if your device enters battery saver mode. There’s also a known issue where if you have scaling greater than 100% the blurred background may appear distorted.