- Dredd
- Melancholia (may not qualify for some sci-fi fans, I suppose, and I can understand why—it's so very allegorical)
- High Life
- Under the Skin
- Annihilation
- Ex Machina
- Edge of Tomorrow
- Looper
- Blade Runner 2049
- Sorry to Bother You
- Arrival
- Mad Max: Fury Road
- The Last Jedi (I know lots of people hated it—I think it's the only more-or-less good Star Wars movie since the original trilogy, and was shocked at the broadly-negative reaction, having come out of the theater thinking "finally, we got a good one, even if it did play the ending way too safe; everyone's going to be so happy!". We're not gonna change each other's minds in HN comments. Agree to disagree.)
And that's just the ones I've seen and thought were somewhere between good and great. And that I could remember or quickly find a reminder of with a quick search. I hear very good things about the new Planet of the Apes series (like, "each entry is better than the last" good) but have only seen the first one. Lots of people liked Rogue One, Snowpiercer, Ad Astra, and Interstellar (I didn't, or at least didn't think they were notably good, but hey, lots of people did). Godzilla, Pacific Rim, and Kong were OK romps. Heard good things about Upgrade and Attack the Block, but haven't seen them. The Martian was OK (some loved it). Inception was alright (again, lots of others like it way more than I do).
How many really good sci-fi movies did the 70s produce? The 80s? I think we're doing fine.