Along with the newer Raspberry Pi 5, there's also now the release of the latest upgraded version of the Raspberry Pi OS based on Debian 12 'Bookworm' giving you a big bump to various software included. While the main OS upgrade won't affect too much, there's a lot of other changes inside this Raspberry Pi OS release to be aware of that their team has been working on to see their debut in this release.
Some of the big changes includes the move to using Wayland with Wayfire, which should look mostly the same but the tech under the hood is completely different. With this they also added a small amount of eye-candy like window shadows, window open / close animations and more. There's also the Power plugin enabled by default, along with a new GPU plugin similar to the existing CPU plugin to show system load but that's not on by default.
PulseAudio has been replaced with the newer PipeWire, NetworkManager as the default which brings more functionality like finding hidden wireless networks, VPN support and more. You'll also get a a "Raspberry Pi-optimised" version of Mozilla Firefox, that brings with it enabled V4L2 codec support for better video performance, support for Widevine DRM for video streaming services and work on enabling cameras for video calling.
Sounds like a rather nice upgrade!
See the full announcement here.