The update is evident when browsing for movies and TV shows in the TV app, with PlayStation Vue now listed as a location to stream content alongside previously supported apps like HBO GO, Prime Video, Showtime, Starz, Hulu, and others. If you subscribe to PS Vue and have the app installed, you can add PS Vue-compatible films and TV series to your Up Next list, and as you watch them in the PS Vue app, Apple's TV app will update and keep track of your progress.
As some users on Reddit pointed out, live sports also appear to be supported, so you'll be able to add games to your Up Next list, then jump directly into the game from the TV app to PS Vue and start watching. Apple hasn't noted PS Vue as a supported app yet on its website, but numerous users have reported seeing a splash screen when opening PS Vue on Apple TV, asking them for permission to connect to the TV app.
While there are nearly 90 apps supported in the TV app now, including a few live news apps, PS Vue's addition marks one of the first times an over-the-top live TV streaming service has been added. Rivals like DirecTV Now and YouTube TV lack this compatibility.