The robot launch is sort of the precursor to the precursor: this could help with the Lunar Elevator, which in turn could help with the Earth Elevator. In the lunar version, a base component--a space capsule, basically--would be attached to a rocket and sent toward the Moon. When it got close enough, a cable would eject from the capsule and attach to the surface of the moon, allowing for transport between the surface and the capsule. Since a full connection between the Earth and the Moon is still decades away, it would work as a checkpoint: A rocket could be sent to the orbiting station and people or objects could be lowered to the Moon, similar to how the robot in the test project would travel.