I think it is worth the upgrade if you want to use google pay. otherwise, imo, it is really nothing to brag about. So far I have been disappointed with the lack of watch faces, The new wear os is pretty good and easy to use. Too bad you missed an earlier sale this week. Maybe it will be back today or on Monday.
I usually use Samsung Pay with my phone. I'm really want the body fat sensor. I'm a nutrition and fitness junkie, so I use Samsung Health the most.
I normally use samsung pay but since they took away mst it is no longer needed. I got the watch for for google pay, The point is, if it has what you need, get it ;-) I would wait till monday in case there is a cyber monday sale on it.