Microsoft has updated the Movies & TV app for Windows 10 with elements of the recently announced Fluent Design (aka Project NEON). The latest update for the Movies & TV app adds in-app acrylic to the hamburger menu, which essentially means it has a blurred background as you can see in the screenshot above.
This is obviously just an element of the Fluent Design system, as Microsoft plans on bringing it to other parts of the first-party apps in Windows 10. The Movies & TV app on PCs also has the similar acrylic — but it uses background acrylic rather than the in-app acrylic shown in the screenshot above.
If you are a Windows Insider and want to give the new Fluent Design element a go, you can get the app from the Windows Store below.