That is where I believe you are wrong.
It's not a competitor in the sense that it rivals what ED is doing, but more importantly it's a competitor for time - that's the only important thing here. Time. There are only so many hours in a day and each person only has a certain amount of free time to be filled with whatever they please - yes, you can easily split your time and play both (or more) but ultimately that is what each game is competing for .. your time.
Yup, its a competitor for time, but there again, so is every other game i have installed on my computer, and I don't think we are considering those.
Besides, i'm planning on getting NMS for the PS4 for me and the kids to play, so its going to be more of family activity. Daddy only time will remain ED time
And for the moment, yeah, if/when SC is released, things will need to be revisited. However, I currently am no aware of whether the state of the underworld is in an endothermic or exothermic state and what the forecast is for when hell will freeze over.
Besides, from what i see so far, SC is going to be a FPS with spaceships, whereas ED is a spaceship game that ultimately will have some FPS elements. So don't think SC will grab much attention in the long run for me.