Windows 10 built-in apps have started to feature rounded window corners. See the numbermachine and Photos.
Windows 10's new look comes to the operating system's built-in apps as the company has started work on a new rounded corner on the utility windows.
Applications such as Calculator and Photos have already taken on a new shape in the utility windows that appear after a user right-click.
Microsoft has been trying to change the look of Windows for a long time and we even know that it is trying to redesign the Start menu with version 20H2.
The first changes that are logically visible on your computers, come in the appearance of the programs Calculator, Photos, Movies and TV, Maps, Calendar and Stickers notes.
This is likely due to the implementation of the new WinUI controls in the applications. So far the change has not penetrated itself shell of Windows, but from the screenshots released by Microsoft, it's really only a matter of time before we see rounded corners everywhere.