I think Apple Watch 2 having the same design is a mistake. We can wait two years for a new Watch, but it should at least be a refinement in the design. It's practically the same watch to the untrained eye.
The MacBook Air has had the same design since 2010. Apple doesn't make changes to the design for the sake of change, but only when they are confident that the new design will be better.
If anything, I take it as indication that Apple is currently satisfied with the design of the Apple Watch and has no intentions of revising it any time soon.
I can live with that.