Let me quote what I said in the other topic which got locked,
Im not getting it either... besides, GTAIV wasnt on par to my likings. If it was any good I wouldve invested on another version but since its boring already its pointless buying it for the PC. Although, generally speaking, you can run GTAIV much better on the PC than any console you can dream of. I played San Andreas on the PC and it was fantastic. The AA and graphic settings made it a good game, and it looked way better than the horseshit it was on the old-gen consoles. Im sure the same could be said about GTAIV on the PC, itll look much better and itll run much better. No more jaggies and no more stutters. However, from a storyline perspective its the same old crap so if you have nothing good to do on the console version I dont suppose the PC would be any better...
Ill still stand by what I said. As much as I would love to play GTAIV on the PC since it will "look" better, the game itself lacks the attraction of going back to it.
In any case congrats to all patient people who waited for a PC announcement, they deserve it!