Given the feedback from the public preview, the prevailing wind is to continue working on the issues reported and delay a final update release once the main stuff has been dealt with satisfactorily. I think this makes sense as it allows the DirectX 9 version to continue for those deep in finishing their projects, and for those who want to put a tentative foot into the future to join us with the public preview builds.
PC SPECS: Windows 8.1 Pro 64-bit, Intel Core i7-5930K (PASSMARK:13645), NVIDIA Geforce GTX 980 GPU (PASSMARK:9762) , 32GB RAM