Infinity Ward's studio head Grant Collier, who we reported yesterday was unhappy with the overuse of sandbox gameplay and destructible environments, told IGN in an interview that there was no interest in using Live Anywhere for PC and Xbox 360 cross-play.
The Call of Duty 4: Modern Warfare developer put it bluntly: "We said no and they didn't call back." Clarifying, Collier said "[it's cool] if you're playing online poker, but who wants to be playing an RTS on a console and have some guy on a PC clicking and dragging all his troops, attacking your base while you're sitting there with your thumb sticks." The keyboard/mouse vs. gamepad argument is a long-standing battle, and clearly Collier feels that they cannot be equals for fast-paced strategy or first-person shooter titles.
Live Anywhere is currently in use by
Halo 2 (update: nevermind), Shadowrun and the action-packed Uno.