I'm rather underwhelmed by it. Not that I had unrealistic expectations and I know apple does things incremental, but I think that some things that people have been clamoring for have been ignored.
Custom watch faces is what comes to mind. Yes, instant open apps are great, except for the fact that apps on the watch are a virtual non-factor. People are not buying the apple watch to play candy crush. Apps are not having the affect on the watch as they had on the iPhone. I'm ok with that, but what it does do great, is changing the watch faces, so why not build on its strength?
I'm sounding a bit ranty, and I suppose I am, but I really was hoping in this incremental update, that apple would throw us bone, but they didn't.
I'll still use my watch, and its a nice piece of technology.