I definitely plan to, though probably not on day one. I have a feeling that it will probably be really buggy at first, both because it's Bethesda, and because it looks really ambitious feature-wise, so will probably need a while iron out the worst bugs. Also I play on Linux, so will need to use the Proton compatibility layer which might not work perfectly at first.

I love NMS though, and have over 1600 hrs. in it. NMS has a charm, and aesthetic vibe that seems quite different to what I have seen of Starfield, so I don't think it will replace NMS for me, I plan to play both.