Due to hardware specialization, a PS3 could be faster than a PC at the PS3 release date if used for gaming purposes (but not 7 times! maybe 25% faster? probably they'll be very even).
But the PC version will come out a while after PS3 one is out, and you can always downgrade graphics for PC version, which means you prolly won't need to spend so much if you want to upgrade your PC for playing GTA:IV.
I remember playing GTA3 with an AMD 800MHz + geForce2gts with almost no problems, and that was a pretty slow system at the time.
Last edited by stenyak; 03-15-2007 at 08:42 AM..