Metroid Prime: the thread.
One of the best looking games of its generation, running at a locked 60fps, and came out very early in its console's lifecycle. From a studio that had never made a game before. Ridiculous achievement, really. Still looks good today.
Yeah, Metroid Prime would still look stunning today in 1080p on the Switch. It's actually remarkable how well some games from the PS2/GC era still hold up once their resolution gets boosted and they're presented in widescreen: Metroid Prime 1+2, Mario Sunshine, Resident Evil Remake, Resident Evil 4, Wind Waker... it just shows how little power it takes to produce great looking games.
OT: Resident Evil Remake looked incredible for its time and still looks amazing today in the HD remaster. Of course, it's probably not technically ahead of its time as it used pre-rendered backgrounds, but it looks stunning even today. Also, Shenmue. Couldn't believe what I saw when I saw screenshots of the game appearing in print magazines back then.