Eventually, with satellite to satellite laser links, and full global coverage with this efficient number of highly inclined orbit satellites, they intend to capture the entire market that is right now addressed by various very expensive motorized tracking geostationary dishes mounted on offshore vessels, plus L/S band inmarsat, iridium, and others.
Offshore oil and gas, cargo ships, Cruise ships, coastal vessels, medium-distance ferries such as in Greece, business jets, airliners, portable military applications, data links to offshore scientific applications for buoys and weather, all sorts of stuff.