Wait, things are moving fast
Who confirmed that COD on PS4 is native 1080p?
Btw it's clear that the PS4 version will have an edge at this point and people should expect the same for all the other major multiplatform games (BF4, AC4, NFS).
You can't blame Microsoft for not releasing easily infos which can be damaging when an other company is involved. They're right in saying that this is something that Activision has to talk about.
The story about not knowing the resolution at this stage doesn't sound credible even in the (remote) case it's true, they should have just said to ask Activision since the beginning. So this is an other PR misstep IMO.