GT4-HD: from 480p to 1080i on the ps3 FBC; you can definitely notice big graphical improvements to both car models, textures, reflections, road surface, environment, basically everything while maintaining 60fps. A true
Gran Turismo 4 PS2 on PS3 (60gb) gameplay - HD 1080p - YouTube
Gran Turismo Sport vs GT6 vs GT4 Show Impressive Visual Differences, Beautiful Screenshots Released