1. GTA IV is NOT exclusive to the PS3, it will be for the 360 as well.
2. The Playstation 2 is NOT like the Playstation 3, because when Sony made their console they said it would be released on the same day as the 360, this changed at the last minute and it pissed off their third party developers because now they had a bunch of extra overstocked Playstation 3 games that would be completely useless for a full year, causing Sony to lose a bunch of its exclusive titles that made the Playstation 2 great.
3. The Playstation 3 has 0 rumble functionality, which surprisingly is the main thing that makes me not want to get one...