Yea they are making an extensive library of military vehicles and objects, something we currently have no resources (and no need) to do ourselves. Some of those will find their way into OT, mainly as samples of vehicles or structures that we currently do not have present.
As it was mentioned elsewhere on the forum, clouds were specifically developed for them, in an alpha version that does not yet work globally, but still works for some simulators they are making.
Graphics- and physics-wise OT and Titan are quite connected, so if something seems to be solved from the presentation screenshots, that would imply it's been solved in OT first. Of course, Titan will have lots of custom developed content. They might also go and create a mil game on OT in future, using those assets, but all base world rendering & simulation functionality has to be in the OT engine first.