why in the world would you want to play 2k9 on a pc? do you not own a console? ps3, 360, even ps2?
PCs are by far the most powerful of gaming systems. They are the most flexible and have an unparalleled amount of potential for coding by gamers. A Ps2 should not even enter into the discussion at this point, as it is ~1.5 generations old now.

PCs can use the same controllers that consoles do. They are every bit as well built for any type of game as consoles, although the latter are certainly more convenient.

It will be interesting to see how GTA IV plays on PC. I absolutely love the game for Ps3.