https://arstechnica.com/gadgets/2021/11/apple-watch-series-7-review-its-a-series-6-with-a-slightly-bigger-screen/

One of the oldest complaints about new technology is that, by the time you get it, it’s already obsolete. But this year, Apple Watch Series 6 owners can breathe a sigh of relief, as the Apple Watch Series 7 is essentially the same device with a (largely imperceptible) facelift.