Its not that simple, really. The watch has very little utility except for people who need to scan notifications in real time.
I think app development for a postage size ui won't be magical. The watch is a solid niche product for uncritical brand enthusiasts.
Oh no, this is going to be a ubiquitous product category. Nothing niche about it. It just needs to be fully fleshed out. But if Apple can't themselves define and make the case for it..