I think you misunderstood here. It is definitely the right thing to have 16gb these days. My worry though, was about whether or not Apple knows that they will increase the requirements of ram in the next 1-2 OS systems so this could essentially end up being the same situation as 8gb.
ie. if you raise ram and next you increase the ram requirements by the system then you end up with 0. And that is my worry/thinking here.
If on the other hand that will not happen in the near future then this move by Apple was the right call and everyone will benefit. Its just weird that even Macbook Air that didn't get updated was ram bumped. Its un-Apple-like unless they know something we don't (which is usually the case)