If you’ve ever used the Voice Memos app before, you remember the microphone with the little VU meter. It’s been replaced by an image of the waveform as it records the audio.
However, in the past, when we’d record and the app would enter the lock screen, you’d just see a red bar that said it was recording. Now, you can actually see that the waveform, even while in the lock screen. It’s not a major thing, but it’s very different from before, and it does look prettier.