I think 1st gen Apple Watch was a good success and was not reworked from another product - sure there were other smart-ish wearables (like Pebble and FitBit), but Apple's first launch was really successful.

Same goes for Apple AirTags: first iteration (no reworking) and they're a complete success - people are using them for pretty much everything. (I do know the privacy concerns that come up, but Apple's semi-addressing them).

Regarding the Watch, obviously they've now iterated and improved on its features, but the first release was a pretty big success and continues to be so.