Everyone I've known who has had a smartwatch has basically liked it (including people who have Android Wear smartwatches).
Only one person I've known who's had a smartwatch has told me that they were worth the money. In general, the consensus has been "Given that I have it, I like it. But it's not a big enough deal to be worth several hundred dollars."
Totally agree, the old Nokia phones used to last entire week with a single charge, I don't see people hanging on to it.
I've seen many skeptics who end up actually likeing smart watches after using them.