They don’t seem to mention how to get off the ground again after such a landing.

If that requires building a launch platform and/or shipping in a first stage, or moving the vehicle out over ground towards a launch facility, such landings will be expensive (even can end up being one way trips), making them economical for very few jobs.

The punchline is "from many location to any location". They're not saying they can launch from any location. What it likely means is they can offer towing for a broken satellite back to any secret hangars in Nevada, and deposit returned for intact tow vehicles.

I do wonder what it is even possibly useful for. Asset transport from orbit sounds sci-fi.

With the advent of the space force, pretty much every space company is targeting military contracts (at least partially) since that is a huge source of government funding

The advent of the Space Force is not going to be a watershed in DOD contracting; the services are nothing but force providers who fulfill the requirements of the combatant commands. Demand for DOD space assets is merely going to be managed by the Space Force now in service to already-existing COCOM requirements; the demand signal is what it is.

Those contracts were happening pre-Space Force. Space Force's mission existed inside USAF (specifically, but other services and TLAs as well) prior to USSF being created.