The problem is:
Apple have created a new device, that, in all honestly very few really want, and even less need.
They have invested a LOT of money in this project.
They have 6 months to throw money in all directions, self promotion, displays in fancy places, getting celebrities to be seen wearing it.
A massive drive to try and create a need / want that at the moment does not exist.
You can't really spend money in attempts to make people want something they don't really want.
You'll have limited success short term, many will just be swept along with it all, eyes will glaze over and they will follow the engineered path, but it may well be short term.
You can buy temporary success, but people will work out for themselves if it's amazing and they can't live without it, or, like some did with the iPad, simply realize after a while they don't really have a use for it.
Other firms have tried this, and the public, whilst interested, are not swarming forwards, you get some customers taking a few bites, and a few get hooked, but the net is not coming up with a big catch.
Being Apple, and with Apple's money driving the products profile HARD with a big H over the next 6 months, they are going to do everything they can to persuade people they NEED to have one.
We shall see. Short term, it'll be a hit for sure, there will be an initial wave and some excitement, and as it's Apple the wave will have some body to it.
But You can't make people need something they just don't need.
Again, IF it was a stand along product, it would have more strength as you could leave the phone, and use the watch whilst out and about. That COULD work for some.
With this 1st attempt, having to have the phone on your person, and only 2 or 3 seconds from being in your hands, it's a tough one.
Why struggle to use the watch interface, when literally in 2 or 3 seconds the phone is in your hand and you can do everything the watch can do and more 100x easier?
For most people, in everyday scenario's.
If it's super easy to just use the phone, you have on you anyway, why struggle to use the watch?
It's a tough one to picture this right now, as it's not really answering a need people have.
I'd almost have preferred Apple to have gone super slim, very classy looking, and just of made it a fitness/health tracker, message notifications, and a nice looking timepiece.
Not do what they have done, which is to try and make a tiny iPod Touch for your wrist to do things worse than the phone you are carrying anyway can.
We'll see, but it's going to take a year or 2 or 3 until we look back at this and go wow, what a revolution this has been amazing, or we look back on the biggest most expensive flop Apple has had on it's hands in years as they could not buy their way into being wanted when no one REALLY wanted.