The argument is in the last two paragraphs, does Apple have these sleeper hit features, like for example extended battery life, waterproof, wifi and some killer app like facetime calling? It's already less intrusive then a smartphone for reading messages.

The iPod had a slow start as well and I remember the first responses to the iPad. The time of smartwatches will come I think, question is, just like in the article what will be the killer feature?