I'll need real game play footage to get on that hype train. Like most sci fi game resort to some vibrant mushroom world (Morrowind), Outer Worlds, and that crap just turns me off. I prefer a nasty scary desolate universe like Aliens. Even doom 3 had a good vibe and art style there. Don't get me wrong, I'll probably play outer worlds, but all the neon color I don't care for, feels artificial.
I didn't have any idea what fallout was about though and previews of it looked kinda corny to me, but once I played the familiar Bethesda game mechanics I liked it a lot, so I expect the same with Starfield.
Half life 2 had pretty good alien design too, I liked how grounded it felt. Most space games go nuts with color. Like if they are inspired by Star Wars I'd be pretty happy too.