User blog comment:Deathmanstratos/CONFIRMED FAKE:Modern Warfare Collection for Xbox One and PS4/@comment-87.110.52.104-20140523051806/@comment-1055346-20140526002017

According to this article, http://www.qj.net/qjnet/playstation-3/modern-warfare-2s-native-resolution-is-600p-on-consoles.html, Modern Warfare 2 ran at a native 600p and was upscaled on each console to 1080p.

According to the video game consoles part of the "1080p" article on Wikipedia, The Playstation 3 and Xbox 360 were both capable of upscaling the resolution to 1080p. The difference is, from what I understand, that the Xbox 360's upscaler was a default part of the hardware while the PS3's needed to be programmed into each game(?)

http://www.qj.net/qjnet/playstation-3/modern-warfare-2s-native-resolution-is-600p-on-consoles.html