At 2min 41s in the video above, care of Experimental Aircraft Association, Burt Rutan asks Sir Richard Branson about the prospects for developing an orbital system and Branson gives a cryptic answer
Rutan first spoke of an orbital version of this WhiteKnight, SpaceShipX launch system way back in 2004 when he visited the Royal Aeronautical Society
Thanks to Flightglobal freelancer Jeff Decker for pointing Hyperbola to this video