I tried GTA Eps on X360 for a few mins and man GTAIV looks like shit regardless of your platform which is a shame because the core city when maxed out is gorgeous.
PS3: Blurry, low res look for everything from textures to effects, jaggies, 30fps maybe - ugly
X360: low res look for everything from textures to effects, jaggies, 30fps maybe - ugly
PC: sharp detailed high res look for everything, horrible jaggies, horrible performance - less ugly
PC 2020: sharp detailed high res look for everything, supersample 4x AA, 60fps - drop dead gorgeous game
I guess I'll double dip on the GTA eps in 2020 steam sale when I have my awesome gaming PC of the future that can't play GTAVI!