Most console games have PC ports that support it. The consoles have USB ports, so what am I missing?
Is it more of a balance thing?
Call of Duty is notorius for its horribly effective auto-aim (anyone who has died when getting shot 3ft to their left knows this), which (IIRC) isn't supported in the PC version.
I used to be a console gamer, but after playing FPS on the PC, I much much much prefer the keyboard/mouse layout and precision.