So 2.8m in US alone in 2 months, not counting the other countries?
Terrible numbers!
(for all the other players)
Apple sold 6 million iPhone1's over five quarters. So aWatch is doing better than that.
iPhone was ALSO a SLOW burner (something people seem to forget). First version of the OS didn't even have cut/copy/paste for god's sake. And HW upgrades were slow --- 3G only gave us faster cellular, same slow CPU, and the big jump in the 3GS CPU was from only from horribly slow to slow.
It was only with the incredible iPhone4 (retina and A4) that Apple really hit it out of the park and everything came together.
Point is, I expect watch is on the same trajectory. Personally I love mine, but I am also aware of how painfully slow it is and how so much of the hardware needs to be improved. (In my case I want the heart beat detection to be a lot more robust, I want a much stronger buzzing [not the finger haptics but the wrist haptics], and I want a much louder, higher quality speaker.) Some of this will be improved in SW; much will, like the iPhone, come in time as people within Apple having used the device for some time, fix its most glaring flaws.
People have become unrealistic about how long anything takes. It simply takes TIME to iterate and improve a product. Like I said --- compare iPhone1 and iPhone4 --- night and day --- 2007 and 2010. I expect even aWatch 2016 and aWatch2017 will still have conspicuous limitations, since much of their design (like the SoC) is probably already underway and can't be changed much. But further out, say 2018, look out.
It's reasonable to say that aWatch does not meet your needs today (as long as you've given it an honest lookover); it's a lot less reasonable to claim that therefore it cannot and will not improve.