They make it sound like there's no native SDK, only a Unity SDK. That seems like a mistake if it's true. Unity it's great for prototyping and for certain kinds

They make it sound like there's no native SDK, only a Unity SDK. That seems like a mistake if it's true. Unity it's great for prototyping and for certain kinds of applications but as a current VR and possibly future AR developer I want the option of a native SDK, not least for access to other engines like Unreal.