Cruise missiles will be introduced in 1.1 as well. In gameplay terms, they are basically more expensive, more destructive versions of the drones present in the mod.
While the cheaper price of drones makes them capable of being used on a regular basis, cruise missiles are designed as a weapon to deliver "burst damage", if you will. Launching salvos of cruise missiles at critical moments and specific sections of the front can be highly effective, but their price makes such attacks largely unsustainable for longer periods of time.