Saudis fear tide of Syria war turning against their interests.
Translation: Saudis want the US to protect their interests.
Saudis play it close to the vest and generally announce nothing.
The announcement should be taken to mean that they are now free of the binding agreements with the USA that was holding them and their coalition of Turks and other Gulf powers from action in Syria.
That's what we've been doing for the last 25 years. Every US military action has been to benefit the Saudis, from Kuwait, to Bosnia/Kosovo, to Iraq.