One of the stylish visual changes to the iPhone on iOS 26 is a new layout for the lock screen when music is playing. Artwork can now be animated and shown full-screen on the iPhone display, with playback controls resting on a platter of a liquid glass.
You can try this out right now with Apple Music. Play a song that has animated album art, and lock the phone. But users of third-party music streaming apps like Spotify will also be pleased to know that Apple is opening up this capability as an API, so third-party developers can also adopt it.