Multiple sources from around the web report that while Call of Duty: Ghosts has been confirmed to run at a native 1080p on PlayStation 4, there's growing evidence that the Xbox One version will natively run at 720p, but will be upscaled.

NeoGAF members have shared their confusion over the fact that when we recently got a chance to preview the game, it was shown off on PlayStation 4 rather than Xbox One. Considering the franchise's long history with Microsoft, including exclusive content, they posit that the only reason the PS4 would be used is because the game looks better on that console rather than on Xbox One.

While this may just sound like a conspiracy theory, a host of supporting evidence has now been put forward to support the claim. For starters, when Microsoft's Albert Penello was asked on Twitter about the rumour, he responded, "I've seen COD: Ghosts running on Xbox One. It looks f'n amazing. Wait for real footage, then judge for yourself."

While the words are comforting, they don't address the claims that the game is native 720p. Similarly, the company's Phil Spencer responded by saying, "As first party I don't get builds of 3rd party games. I know what our 1st party games are doing." Compared with Sony's Adam Boyes proudly announcing at the PlayStation Brazil conference that the game runs at a native 1080p on PlayStation 4, the evasive answers have understandably raised eyebrows.

Obviously there are people out there who know what resolution the game runs at on Xbox One, but several journalists including Forbes' Erik Kain and Furious Fanboys' Jeremy Conrad have come forward to claim an NDA forbids talking about it. The embargo date for all reviews is reportedly on November 5 - except for the Xbox One version, which comes a week later on November 12. Pete Dodd, one of the first people to suggest that the Xbox One version would have a lower resolution and founder of a campaign against next-gen DRM, wrote on his blog that Activision has remained mute so far because work is being done to get the game up to the native 1080p mark on Microsoft's console as soon as possible; whether this is done by a patch on day one or later down the line remains to be seen.