Anything that was originally meant for 1080p, rather than 2k-4k rez is a SD game for me. I always try to play games on their native resolution, rather than have them stretched and blurred. JC3 is a good example. Some other games that I would rather play on SD + 1080p TV than 1440p upscaled:
Deus Ex Human Revolution
Hollow Knight
GTA4
Dishonored
Halo MCC
Dark Souls
Just because you can set a game’s resolution to 4k, doesn’t mean anything for the quality of in-game textures.
Anything that was originally meant for 1080p, rather than 2k-4k rez is a SD game for me. I always try to play games on their native resolution, rather than have them stretched and blurred. JC3 is a good example. Some other games that I would rather play on SD + 1080p TV than 1440p upscaled: