HiTech has said that cover and concealment for GV's is in the works, as is a towed artillery piece. In the last TE release, there were also a bunch of new objects, all prefaced with the designation "TB" (i.e. TBBarn, TBWall, etc). These included partially destroyed buildings and walls. Two new terrain objects were introduced, one that is undestroyable and another that is destroyable by anyone (friendly fire and enemy). He is also looking at a floating forest canopy that will float above the ground, similar to the way cover is done in IL-2.
BTW, I've really gotten into GV's lately. Kanttori is updating his Fin-Russ terrain to include some city/towns set up for GV combat, using all these new objects. These include 2 or three new bridges, btw.