Yes--first, I suspect that Apple also has a utility patent on the precise locking mechanism in the works. It's just that design patents take less time to work through the system.
But I also think that the design patent itself would preempt Click and the other third-party adapters I've currently seen as constituted--and I suspect that this particular patent will at least delay third party solutions while they try to design around it.
I'm very curious to see what will happen from there.
I don't think Apple could really go after anyone until the patent was granted.
However, that doesn't explain the dearth of high profile third party licensees being lined up by Apple. Given their fashion bent, we should have seen several big fashion houses lined up to provide third party bands for the watch, even before the patent was granted.
There is one explanation -- Apple wants to make as much money off their own bands as possible before opening up the field. Apple is now a watch band maker for all practical purposes, they have to compete with the other major manufacturers of such things on the same fashion driven playing field. I'm sure Apple believe they have the resources to do this themselves as well as any of the fashion houses. And I'm sure the fashion houses don't appreciate Apple's terms which almost assuredly are that they get 50% of the gross retail price.
This is the same reason I don't think we've heard about third party watch faces. Again Apple has the ability to compete with any design house, and will likely create their own for sale on the App Store, just like ringtones. They will only open the door to licensees who want to play by their terms -- want a Miami Dolphins watch face? Then Someone will have to secure the license and then let Apple take 50% of the sale price, and hope they can still make money.
I think this is Apple just being greedy until they know whether their investment in the watch is going to pay off the way iPad and iPhone did, or whether it's going to be more of an TV kind of hobby.