I'm with you on this one. It was such a poor port and really wanted at least 3 cores so folks with high-end dual core machines at the time (me...) were getting s**t on by the cheap AMD triple core machines. Still, once the modding community got ahold of it GTA4 really looked immense. It still does.
Hopefully with it being optimised on the new consoles we should see a good PC port this time.
Yep, that and the fact new consoles are the same architecture, so we really shouldn't see any optimizations really required tbh.