No news. watchOS continues to be an interesting nichè, but we’ve had no real (as in: either in volume or intensity) interest in it and considering the large engineering, development and QA undertaking it would be to include it as an official export target, we haven’t prioritized it so far.
As for the communication between an iOS app made with Fuse and a watchOS app, this can be solved using Foreign Code.
Also, just as a personal take on something mentioned further up in the thread:
Apple tend to favor featuring apps which support Apple Watch in the app store
I don’t think that’s the case, and if it is, as they say on Wikipedia: “citation needed” I would just focus on making a great app in and of itself, and not on external factors such as this.