Initially posted by Wags via ED Forums.
DCS World is a single, unified core for all DCS products to operate within. Rather than separate installations for each DCS products, the single DCS world interface allows the user to access all of their DCS products in a common user interface. DCS world also includes a DCS News service and will allow users to purchase DCS titles through the interface at a later point.
DCS World will be updated as DCS evolves with changes to the rendering system, AI units, AI logics, effects, etc. All aspect of the simulation, outside the flyable aircraft, add-on maps, and other paid-for content.
The current DCS World is still in beta and will evolve over time with new features.
The initial DCS World comes with a free flyable aircraft, the Su-25T (exported from Flaming Cliffs 2).