Yup. NES to SNES - huge! SNES to N64 - huge! N64 to Gamecube - huge! Gamecube to Wii - ehh, widescreen is nice, graphics aren’t that much better otherwise. Wii to Wii U - more of a jump than Gamecube to Wii thanks to HD. Wii U to Switch - not really that different, it’s the system actually being popular and portable that makes it better more than the tech.
Used to be that 5 years was enough time for graphics to be astronomically better. Now we have games approaching 20 years old that don’t look too bad by today’s standards.