3D models will have some importance in the sim, for missions where you have to sneak under the hull of a ship/subs to take photos of his propeller, sonar , SOKS, .... or to watch the launch of a new weapons (missiles for example). And maybe hide under the hull of a cargo ship to avoid detection to enter an harbor to deliver a SpecOps team
Even to surface to MedEvac a sick crewmen by helicopter.
Who known? The devs are tightlips.