As long as the 360 exclusives keep ending up on the PC after a while MS will never manage to take advantage of its exclusives as well as Sony or Nintendo.
I will admit there are some 360 games I would like to play but I know that by waiting out I will get them on the PC anyway.
To get the PS3 or the Wii exclusives you eiher get the console or you just don't play the games....
Trying to keep the PC market healthy for Windows is really doing the 360 a disadvantage...
I know not everyone has a good PC but I play WoW so the people I talk with do have a decent PC and I can tell you that this fact weights heavilly on their console buying decision, a lot of them don't feel the 360 is differentiated enough from the PC to warrant purchasing one over a Wii or a PS3....( I'm speaking somewhat casual gamers here that spend a lot of their gaming time in Wow( their wow gaming has nothing casual, their gaming outside of wow is) and not so much outside playing on a console, not hardcore people that have to get a game the day it comes out..)
PS3-Xbox360 gap : 1.5 millions and going up in PS3 favor !
PS3-Wii gap : 20 millions and going down !
