PS3 version of GTA 4 confirmed 720p, and 640p rumor came from a post

[Viper1]

Kyros said:

Those kind of art assests cost a lot more money and completely remove the whole point of being cheaper for developers to utlize.

Having lower technical specs is nothing good. You could develop the same game but have a higher resolution and it would STILL be better. HD resolution doesn't make a game more expensive per se. Seriously the NRDF(Nintendo reality distortion field)  is humming this evening.

Thank you for proving you know nothing about video game development.   My friends in the art departments would like a word with you.