Pachter at Game Trailers has covered this multiple times. Console royalties can run up to a flat $15 per copy of a standard release. Keep in mind that Sony and Microsoft both sold their consoles at a loss for the first 3 or 4 years; during that time almost all of the profits came from game royalties. Now, MS is actually publishing GoW so I would expect that they don't pay console royalties to themselves. But you can be sure that they get a very large cut of the revenues.
