I don't think Apple consider the watch a success - they consider it a place-holder, a foot in the door. Battery life is just too big a compromise at the moment, but as silicon becomes more efficient (as it always has done so far), and if some breakthrough in battery tech is developed... they'll be there. I remember that GSM mobile phones were around for almost a decade before they were adopted by the masses - the price and form factor had to shrink.
Still, the traditional watch world thinks Apple did a fucking superb job on the strap attachment mechanism.