I'm a PS3 fan and I would like to see the Gears games on the console. But, I also like to see consoles having exclusives. It keeps the fans excited and keeps the competition flowing. Its another reason to have allegiance to your brand. Extreme fanboys are fools. But, a little 'my dads better than your dad' is healthy. It shows users dedication and passion for the subject.
Gears is undoubtedly an Xbox franchise.