The main problem, I think, is that the benefits of having an Apple Watch are just really hard to explain briefly. iPad was great for browsing the web, emails, films and games in home and when travelling. Apple Watch is much more nuanced.
It's awesome to have one to get notifications instantly, but you need to experience it first hand to appreciate it. Walking navigation is a real revelation, but when explained it doesn't sound that unique. Shopping lists are awesome, but few will get the product for lists. Fitness is kind of neat, but not really as good as many fitness products. Seeing the next event, temperature, date and time in a flick of a wrist is awesome, but most people think it's easy enough to pull out your phone.
Apple Watch is kind of like Live Tiles on Windows Phone. Immensely useful and an experience you'll miss when going back to an icon grid, but not something that will get people buy Lumias.
If Apple Watch is to succeed it will be a slow burn of people gradually coverting based on seeing some and hearing good things about it. I would assume it has a solid Net Promoter Score, so that should help.