I'm sure they will eventually come out on PC. Look at Halo and the GTA's. Both were touted as exclusive to the Xbox and PS2, respectively, and yet they are now on PC. Granted it took them, what, a year to come out?
Personally, I am just tired of most of the console BS. With hard drives and downloadable content, console games are rushed out buggy and undone. One of my biggest reasons to buy a console and games, that they CAN'T be updated and so must be finished at release, is slowly slipping away.
Also, the price of the next gen systems is pretty outrageous, and I have no interest in an HD-DVD or Blu-ray drive. I buy my console to play games. Nothing more. I'm sad I seem to be in the minority. The only console that I may buy at the moment is the Wii. It's got some interesting and different games and ideas goin for it, and I respect that Nintendo is taking a risk to give people something totally different and new.
So, the people that buy a PS3 or Xbox 360, I really hope you enjoy it. But I just wont be getting one.