I was speaking a little more abstractly. For 2D, even if you use an intermediate coordinate system, the transformation between the two can be mapped 1:1 with th

I was speaking a little more abstractly. For 2D, even if you use an intermediate coordinate system, the transformation between the two can be mapped 1:1 with the controller (in theory, not that you need to), because controllers are 2D in design (specifically the directional arrows and joysticks, which have 2D coordinates). I think allows for more natural responsiveness. If controllers had 3D joysticks, or eventually when VR gets better at hand motion, then 3D responsiveness will improve.