SpaceX is eager to improve its landing capabilities, both at land and sea, because of the financial and manufacturing benefits that a reusable rocket offer. During Friday's press conference Musk said, "almost everything on the rocket will be good for ten to twenty missions" an impressive change from one time use rockets that are lost or destroyed once they have completed their purpose.
Speaking at the International Space Station Research and Development Conference in Chicago, the commercial sales manager for SpaceX, Joshua Brost, stressed the importance of a reusable rocket in order for SpaceX to continue its success. Already, SpaceX attached legs to Falcon 9 for the CRS-3 mission in order to test their durability and performance in flight, and steadily built on that innovation in order to accomplish landings like the one witnessed today.