Totally agree, no way I would play these games on PS3 today as they exist in better version elsewhere. For example Heavenly Sword even if it wasn't a critical success is still one of my favorite PS3 games and would be a reason for me to play on PS3.
MGS4 being caged in PS3 hardware forever is a crime, although Konami coming out with a remake of MGS3 and the Master Collection gives me a bit of hope.