Thanks for your interest in the Intel® Real Sense Technology.
This functionality is not implemented yet. It is expected to be available later this year.
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Intel Customer Support
I do not have further information to give about hardware sync at this time, unfortunately.
Regarding upcoming featurses: each time that a new version of SDK 2.0 is released, a Coming Up list is included at the bottom of the notes for each version. That list currently says "MATLAB wrapper, and more". Support for OpenNI is apparently on their to-do list.