I think so. FD are still committed to adding content, and even in the future, should those content updates stop, i imagine ill keep playing.
I won't spend a bent copper on Star Citizen until a) I see a proper release and b) its a game that looks like i'll enjoy. The former is probably many years away, the latter is doubtful as it looks like they are trying to make Second Life in space, not what I want.
Regarding X4 - looks like it might be a worthy successor to the franchise, although like some, ill wait for the bugs to be ironed out first. Like the previous X games, it might keep me entertained for a few weeks, at least until i build up a massive trade empire and then get bored of it. Its what normally happens with the X games for me.
Dual Universe looks interesting, but again, i'll wait and see with that one.
NMS is still on my radar. Its kind of what i wanted from the Spore space stage, but at the moment no play time free to consider it. I have 3 games on the go at the moment. Maybe in a year or two ill take a look at it. Perhaps nab it in a sale.
So, as things look, ED remains the space game for me and will likely do so for a long time yet.
EDIT: Someone mentioned Rebel Galaxy Outlaw. Looks quite amazing, but not what i'm looking for in a space game i think. Its more like a space adventure game.