While SpaceShipOne is suborbital like the X-15, some hope the private sector can eventually develop reusable orbital vehicles given enough incentive.
Kuigi SpaceShipOne on sarnaselt X-15-ga suborbitaalne kosmoselennuk, loodetakse, et erasektor on lõpuks suuteline välja arendama korduvkasutavad orbitaalsed kosmosesõidukid.