http://www.eurogamer.net/articles/2...all-of-duty-ghosts-dev-infinity-ward-responds
Is all that you've just described the reason the Xbox One version is native 720p and the PS4 version is native 1080p?
Mark Rubin: In a way. I don't know if I can point to one particular cause. Early on, we didn't know where exactly the resolution of anything would fall because we didn't have hardware or the software to support it. We tried to focus in on 1080p, and if we felt like we were on borderline of performance somewhere... We tried to make the best decision for each platform that gives you the best-looking game we could get and maintains that 60 frames a second.
There's no specific, oh, well, the VO chat on Xbox took up so much resources that we couldn't do 1080p native. There's no definitive one to one per se cause and effect. It's just an overall thing. We took each system individually and said, 'okay, let's make the best game for each system.'
What everyone will ask is whether this is the result of the Xbox One simply not being as powerful as the PS4, and you're doing your best with the hardware you have, or whether for future versions you may be able to get the Xbox One version running natively at 1080p?
Mark Rubin: It's very possible we can get it to native 1080p. I mean I've seen it working at 1080p native. It's just we couldn't get the frame rate in the neighbourhood we wanted it to be.
And it wasn't a lack of effort. It wasn't that it was like last minute. We had the theoretical hardware for a long time. That's the thing you get pretty quickly and that doesn't change dramatically. It was more about resource allocation. The resource allocation is different on the consoles. That huge web of tangled resources, whether it's threads-based or if it's GPU threads or if it's memory - whatever it is - optimisation is something that could go theoretically on forever.