In fact, Qatar and the UAE now realize they need to be more than just big oil producers to be prosperous. That’s why both countries are positioning themselves to be major players in trans-Eurasian world trade—in fact, the UAE has been planning for a post-petroleum age for a couple of decades, as noted by major expansions of air cargo operations at several airports in the UAE.
Both of those two have been there for a while. UAE makes more off of commerce, being the "Singapore" of the Middle East. Qatar is a major Natural Gas producer. Saudi has been building one of the largest refinery & petrochemcial complexes in the World for years in Jubail.