GT5 Prologue works in 1280x1080 and uses PS3 upscaling trick - by repeating some pixels in anamorphic picture to 1920x1080. So 50% upscale.(It's actually less than GT HD's 1440x1080)
http://forum.beyond3d.com/showpo ... 3&postcount=592
“for me GT5 prologue is more clean than all other cars game like PGR3, Forza2, PGR4... (2x PGR4 framerate, 2x PGR4 MSAA, 2x PGR4 nb cars, better filtering, photorealistic lighting...) replay with this others demo for compare
the visual comfort and the visibility is awesome in this GT5 prologue”