On my side, I consider the recent link announced with that new ''OS'' quite positive.
I was a bit worried about a greater grip that Russia would take on SFOS but now it seems clear that this move means that SFOS will be left independant and that whatever Russia will like to put (thinking about some dirty bits) will be on its specific version.
In the meantime, what will be common between the two OS (which is probably by far the largest share) will be worked together and will then benefit SFOS, including the open-source parts.
It is still unclear though if more of SFOS will be open-sourced: maybe soon... but at least it is still an opened question.