We are very sorry for the complete absence of any ps3 footage.. :lol
Our media & coding team choose what system to show the game off on & Xbox 360 is usually the most popular choice here at Rockstar.. well, most of the time.
But rest assured, that the PS3 version is just as good as the Xbox 360 version. They both look exactly the same & we have made sure to make that as obvious as possible on both platforms. We have learnt alot since developing GTA IV for the PS3 a few years back & we are now much more acquainted with how the console "ticks" & so, It is now on par with the Xbox 360 version more than ever.
You will love it & we have also given a little extra to PS3 users as a thank you gift. Xbox 360 users will receive this further on down the line though so all is well.
Yours sincerely, Rockstar Games.