It exclusive to the 360 period...
Second ever play BFME2? it's for the 360 and works great on a console. It's funny cause before golden eye every one thought FPS couldn't work on consoles. Now there LOTS of great fps's on consoles. Soon we will see a similar movement with RTS's. With the release of BFME2 and halowars it will jump start RTS on consoles. Im pretty excited..
P.S it took halo Ce two years to come out on pc and halo 2 is comming out in early 2007 or more then two years since it was released on xbox. Expect the same for halo wars if it ever is to come on pc.