What I find particularly appealing about this video is the level of detail. Walking through the plant (while hearing your footsteps, no less!), you say layers and layers of pipes, pumps, floors, etc. This is possible through integration with real engineering databases. Since the plant is already designed, why not use the same databases to ensure safer, lower-cost operation?
I can certainly see why learning about this plant in a comfortable, virtual setting, will prepare the operator for true troubleshooting and maintenance when needed.