No game, regardless of platform, even dreams of reaching CoD right now. Sony has its own pet exclusive series now that level the playing field. CoD is the great equaliser and as such, the wildcard. Negotiating those timed-exclusive DLC drops for the last couple of CoD games says very strongly that MS feels CoD is very important to them, especially because of the anecdotal FPS bias XBOX users have.
Oh I'm positive that's Acti's MO, playing both sides of the fence; right now it seems MS is willing to spend more thus get DLCs timed-exclusives, etc. I'm willing to bet Sony provides their "tithe" in other ways, like showing the game on their PS adverts or something.
Many of those own a PS3 or PC also, the hit would never be that big but yes I agree they wouldn't make such a move this gen, but Bobby seems the type of guy to hold grudges for eons. I don't doubt a denial now could mean no XBOX 720 COD 11 in a couple of years.
There is no Sony FPS/TPS that levels the playing field against Halo and Gears. After Gran Turismo you have Uncharted and God of War, GT while declining is still quite large but Uncharted and God of War are maybe around Gears levels.
What data suggests that many households are dual HD console households and/or HD console + gaming PC?