The phone is about consuming/producing content and that's what many popular apps (like FB, Instagram, etc) are all about. No FB app on the watch indicates that the standard FB experience doesnt work on the platform, in the same way it wouldnt work on your kettle. That doesnt mean the kettle is a failure.
The watch is all about quick access to small, self-contained nuggets of information and simple actions. Previously, these have been limited to "what's the time?", "what's the date?", etc. With smart watches we can now have "what's next on my calendar?", "what's the weather like today?", "pay for this coffee", etc. They sound simple but they can quickly become habits. Developers will eventually work out which of these work, but this is a genuinely new platform - it will take time and iteration.
Additionally, any comparison to the iPad launch is unfair. The iPad, in terms of how it is used, really is just a big iPhone.
The watch is all about quick access to small, self-contained nuggets of information and simple actions. Previously, these have been limited to "what's the time?", "what's the date?", etc. With smart watches we can now have "what's next on my calendar?", "what's the weather like today?", "pay for this coffee", etc. They sound simple but they can quickly become habits. Developers will eventually work out which of these work, but this is a genuinely new platform - it will take time and iteration.
Additionally, any comparison to the iPad launch is unfair. The iPad, in terms of how it is used, really is just a big iPhone.