Cryengine, Frostbyte and others support Mantle or will support in near future. VR could really benefit from it as you can more then double draw call’s when doing high FOV 3D. This is where mantle come to rescue. There is also possible to use dual rendering when doing MultiGpu and thus not get that latency penalty from AFR.
+Will really help 3D rendering as Stereo 3D rendering can double(even more when high FOV like VR) your draw call’s and Mantle can push 9x more draw call’s.
+Can do way better MultiGpu
+nVidia can support it too as it is going open this year(target is end of this year)
+Migrate to DX12 will be easy
+AMD share all Mantle code with Khronos group. May or may not get OpenGL Next to share some code.
-nVidia do not support it at the moment but may add support…
So +1 For Mantle support as Unreal engine is no.1 VR engine at the moment!