Games for the PS3 and XBOX360 are not comming to PC! WHY???

We can see a drastic change in games that are developed for the consoles and the PC. All games are made on a computer not on a console so I don't understand why they are making less games for the PC. Don't tell me that this is because of the piracy because it is just as easy to make an illegal copy of a console game as it is for a PC game.

This is my question so please answer as you see fit .