Existing HoloLens devices show semi transparent holograms overlaid on the real world so to speak, in a viewable frame size resembling something like a oversized postage stamp. (That is, holographic content does not fill your entire field of view.) It's not conducive to showing 100% opaque video content for a live drone feed, in my opinion, due to technical limitations (opacity, rendering proximity) and human comfort issues.
I appreciate that they're offering "custom" units and could theoretically fix these issues. But it _sounds_ like it'll be more of a ruggidization and compliance realignment of existing hardware. Pure speculation of course.