The exclusive deal with Sony for 'Call of Duty: Modern Warfare' not only includes survival mode, which will initially only be available on PlayStation 4, it also includes new maps, rewards and more.
This reveals a new promotion on the official Call of Duty website, which says:
“PlayStation 4 players can jump into Special Ops: Survival mode, an exclusive wave-based hord mode. And every Modern Warfare season brings a new location for survival, as well as a special challenge mission and a reward for other game modes. ”
The rewards include new weapons, skins and more, as well as a view of the locations, including Picadilly Circus in London or St. Petrograd. It is also interesting that there are five more missions (seasons) that have not yet been revealed.
If you want to see for yourself, you can find the promotion page at this link.