https://wccftech.com/watchos-5-changelog/

Here’s everything that is new (changelog) in the latest watchOS 5 update for Apple Watch Series 3, Series 2 and Series 1.

watchOS 5 has finally arrived and users are going to be scrambling to get the update right away. But if you’re a long way from home and know that you can’t install watchOS 5 for a good amount of time, then you can have a glance at the changelog of the update itself and see what you will get when you do ultimately install the firmware onto your Apple Watch Series 3, Series 2 or Series 1 device. Remember, the watchOS 5 update is not available for the original Apple Watch model due to its aging hardware.