Talking about Jolla and open social networks (this is not quite what you guys mean, but it fits the thread title as well): I wonder if other platforms can be as tightly integrated into Sailfish as Twitter and Facebook already are. This "social networks are deeply integrated in our cool new platform" typically means there is support for this two and that's it. Nokia Belle has this "1-click-social-network-sharing-feature" (not this exact name, but similar) directly from the camera app, which to this day is Facbook only, and god forbid 3rd parties could extend feature to other platforms. No plugin-architecture like Maemo has (but unfortunately has been slowly decaying).
Now in Sailfish, Facebook is really tightly woven in there (by the looks of it on all those videos), and I'd really love for the same functionalities to work with all the open networks out there