HUDS and GUIs: an inspiration resource site featuring Future User Interfaces
https://old.reddit.com/r/FUI/top/?sort=top&t=all is another favorite of mine. If you want an excessively deep analysis of sci-fi UIs, I suggest https://scifiinterfaces.com/On a related note, does anyone have good recommendations for real-world "power UIs"? I.e, computer user interfaces that have a steep learning curve but are extremely powerful once mastered. E.g, vi/emacs or one line bash scripts + *nix CLI programs. AutoCAD/Blender and other 3D modeling tools also have good UIs once you go through the pain of mastering them and learn how to use them with one hand on a keyboard and one hand on a mouse.