Call of Duty will lead the charge into an era of almost mandatory crossplay with the release of Modern Warfare, and the entire industry will benefit.
There will still be reasons to buy one console over another, or choose PC over console. Exclusives, power, comfort, and so on. But being forced into getting a system from peer pressure via your friends or global sales has never felt good, and this part of the industry dying feels like no great loss to anyone but apparently Sony.
Source: N4G PC Call of Duty: Modern Warfare Crossplay Is A Dam-Breaking Moment For the Industry