In Windows 10 build 17074, Microsoft released a series of new features. But the official change log seems to have forgotten to mention one thing: the Microsoft Messaging application has already tried Fluent design elements. From the screenshot, this messaging app already includes the semi-transparent effects of Acrylic and Reveal. Interestingly, this is also the first major update Microsoft has brought to this app since 2016.
Microsoft announced the Fluent design in May 2017, and there are rumors that the Andromeda device (Surface Phone) that Microsoft is secretly developing is one of the reasons behind this technology giant's transformation.
This device allows users to make phone calls and send and receive text messages, so the upgraded Microsoft Messaging comes in naturally. It should be noted that the application on the PC side does not yet support sending text messages.
It is currently unknown whether these changes will occur on Windows 10 Mobile. In the Windows 10 Fall Creators Update about 3 months ago, Microsoft has made an initial attempt at the Fluent design language and expects more adoption of the "Redstone 4" update.