Sony Playstation 5
Sony PlayStation 4 and Sony PlayStation VR games both receive upscaled graphics, specifically ray tracing, resolution increases to 4K or 8K, and Frames Per Second (FPS) boost to 60 FPS or 120 FPS.
Microsoft Xbox Series X
Microsoft Xbox One games receive upscaled graphics, specifically Frames Per Second (FPS) boost, Auto High Dynamic Resolution (HDR), quick resume, and significantly reduced load times; Microsoft Xbox 360 games receive upscaled graphics, specifically Frames Per Second (FPS) boost (select titles only) and 4k enhancements (select titles only); Microsoft Xbox games receive upscaled graphics
Nintendo Switch
No backwards compatibility, therefore graphics upscaling does not apply
Microsoft Xbox One
Microsoft Xbox 360 games receive upscaled graphics, specifically Frames Per Second (FPS) boost (select titles only) and 4k enhancements (select titles only); Microsoft Xbox games receive upscaled graphic
Sony PlayStation 4
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo Wii U
Nintendo Wii games receive upscaled graphics, but only if you output signal with HDMI cable
Sony PlayStation Vita
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo 3DS
Nintendo DS receive upscaled graphics, specifically improved sound and higher resolution (although this introduces undesirable blur)
Nintendo Wii
Nintendo GameCube games do not receive upscaled graphics, but do look better due to processing and signal output
Sony PlayStation 3
Sony PlayStation 2 receive upscaled graphics; Sony PlayStation games have significantly upscaled graphic, specifically increased resolution, more vivid colors, and reduced load times
Microsoft Xbox 360
Only select Microsoft Xbox games receive upscaled graphic, specifically High-Definition resolution and reduced load times
Sony PlayStation Portable
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo DS
Game Boy Advance games do not receive upscaled graphics, however there is an increase in screen size
Microsoft Xbox
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo GameCube
Nintendo Game Boy Advance games receieve graphics upscaling
Nintendo Game Boy Advance
Game Boy Color games have upscaled graphics, specifically the option to play in widecreen; Game Boy games have upscaled graphics, specifically increased color palette (option to switch palettes at boot-up) and option to play in widescreen
Sony PlayStation 2
Sony PlayStation games have minimally upscaled graphics, specifically more vivid colors, improved output signal, texture filtering, and reduced load times
Sega Dreamcast
No backwards compatibility, therefore graphics upscaling does not apply
SNK Neo Geo Pocket Color
Neo Geo Pocket games have upscaled graphics, specifically the addition of a limited color palette
Nintendo Game Boy Color
Nintendo Game Boy games have upscaled graphics, specifically the addition of a minimal color (and the ability to switch color palettes at boot-up); on a limited number of black colored Game Boy cartridges there is the addition of even more colors (and the ability to switch color palettes at boot up)
Nintendo 64
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo Virtual Boy
No backwards compatibility, therefore graphics upscaling does not apply
Sony PlayStation
No backwards compatibility, therefore graphics upscaling does not apply
Sega Saturn
No backwards compatibility, therefore graphics upscaling does not apply
Atari Jaguar
No backwards compatibility, therefore graphics upscaling does not apply
Super Nintendo Entertainment System
No backwards compatibility, therefore graphics upscaling does not apply
Sega Game Gear
No backwards compatibility, therefore graphics upscaling does not apply
SNK Neo Geo
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo Game Boy
No backwards compatibility, therefore graphics upscaling does not apply
Sega Genesis
No graphics upscaling on Sega Master System games, but sound is improved via upscaling
NEC TurboGrafx-16
No backwards compatibility, therefore graphics upscaling does not apply
Nintendo Entertainment System
No backwards compatibility, therefore graphics upscaling does not apply
Atari 5200
No backwards compatibility, therefore graphics upscaling does not apply
Coleco ColecoVision
Expansion Module 1 allows gameplay of Atari 2600 games, however no graphics upscaling ability
Atari 2600
No backwards compatibility, therefore graphics upscaling does not apply
Magnavox Odyssey 2
No backwards compatibility, therefore graphics upscaling does not apply
Fairchild Channel F
No backwards compatibility, therefore graphics upscaling does not apply
This was a list of videogame consoles that improve graphics on older-generation games.