You forget there is a large group of people that dont even have cell phones, let alone smart watches, but they do have wrist watches. They dont have cell phones not because they dont want them, but because they cant afford them. Also, if you look at sales numbers of watches vs smart ones, you will again see that regular ones are outselling smart by massive margin (in 2015) 1.2B vs 36M. Share of market: 77% vs 23% for mechanical. So again, to say they are obsolete and unnecessary is quite foolish
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