One of the things that still blows me away is the C64 Demo Scene.
I remember several years ago watching Edge of Disgrace by Booze Dedign and my jaw hit the desk! I've always associated the demo scene with the Amiga, it's the first place I saw any. Jesus on Es is still a favourite of mine.
I've just watched one on YouTube, Parallax Tribute 100% by Bonzai. Once again, jaw on desk. Downloaded from csdb to watch on real hardware later. Amazing.