To my eye, Apple's advertising push for the Watch tried to sell it as a replacement for other primary mobile devices rather than as supplementary (you never see

To my eye, Apple's advertising push for the Watch tried to sell it as a replacement for other primary mobile devices rather than as supplementary (you never see an iPhone in those ads). One limiting factor that went ignored by a lot of people is that many basic tasks (calls, texts, browsing ) that can be done with one hand with a phone constrain both hands when operating the watch.