It’s a bit more complicated than that.
It enables a couple of features:
- It provides hardware and frame-rate checks required for FAA certification of the simulator.
- It unlocks features of the simulator not available in X-Plane 12 Global. Specifically – the ability to use cylindrical and spherical projection (as found in large simulators).
You then need to spend a small fortune on approved hardware, then get it vetted on top of that.