For Windows users, iTunes will continue “as is” for foreseeable future, as it is one of the most current apps available.  Only Apple users will see the new 3-way digital approach (e.g., Music, TV, and Podcast apps) as part of iOS 13 release in future.

https://www.pcmag.com/news/368772/apple-itunes-lives-on-for-windows-pc-users

On Monday, Apple announced plans to retire iTunes, but the application isn’t completely dead since it’ll live on for users on Microsoft Windows.   On Windows, iTunes users will see no changes in their experience, the company told PCMag.  At WWDC, Apple said it will break up the standalone iTunes software into three new apps called Music, TV, and Podcasts in the next version of macOS, dubbed Catalina, which arrives in the fall.  Although the full demise of iTunes may be imminent, Apple wants the platform to stick around as a digital store for people who like to own their music. Mac users will be able to access the iTunes Music Store through the new Music app.