Samsung has unveiled ten new watch bands for the Galaxy Watch4 and Galaxy Watch4 Classic. While the bands will not be available until the end of the month, a significant software update for the pair will arrive tomorrow.
https://www.notebookcheck.net/Samsung-announces-an-extensive-update-for-the-Galaxy-Watch4-series-and-nearly-a-dozen-new-watch-bands.598259.0.html
It will be interesting which of these features will end up on older watches.
The Active2 and Watch3 should be able to do most and I hope the OG Watch and Active will get at least some features. Samsung's watch support has been great so far and I hope they continue this trend.