A recent post on the Call of Duty: Ghosts forum states that a huge update for the game that covers all platforms is now available. The update includes hotfixes, new features, stability tweaks, balancing, anti-cheat improvements, eSports and a whole lot more.
The update also includes specific updates for the Windows PC, PlayStation 4, PlayStation 3, Xbox 360 and Xbox One platforms. There are so many things in the update notes that it would be prudent to just point you in the direction of the notice (source link) and let you read all about it yourself.
Just to keep you happy, here's a trailer to watch.