Publisher Activision has released a remastered edition of Call of Duty: Modern Warfare 2. The game is titled Call of Duty: Modern Warfare 2 Campaign Remastered and is currently only available for PlayStation 4.
The remastered edition of the singleplayer campaign has been fully remastered with improved textures, animations, physically-based rendering, high-dynamic range lighting, and more. On consoles it also renders at 4K resolution, a feature the PC version already had in the 2009 original.
Just like Call of Duty: Modern Warfare Remastered, this game likely has minor changes to improve environments and cutscenes, although these changes are not communicated in the press release.