People can flash their genitalia (show screenshots) as much as they like.
Genesis/SNES -> PS1/Saturn = Massive
PS1/Saturn -> PS2 = Massive
PS2/GC/Xbox -> PS3/Xbox360 = Not Massive
PS3/Xbox360 -> PS4/NextBox = Not Massive
It's hard to be impartial though, fond memories will always be fond memories, whereas memories from last week won't be fond.
Fact :p
Proof is that GT4 was still fun on the PS2 even after playing Forza 2 on the Xbox 360.
Super Hang on was not fun after playing Manx TT on the Sega Saturn. (though quite enjoy it for bit of nostalgia nowadays)







