Thinking more about the HMD in the patent, it does occur to me that it might make sense as a cheap novelty as much as anything else. I own an Oculus DK1, so I'm acutely aware of the limitations of a VR platform based on a 720p LCD, but at the same time the design of the system makes the addition of VR almost completely trivial, and there's a point at which it becomes cheap enough that the low fidelity becomes forgivable. Switch already includes a decent GPU, a suitably sized screen, all the necessary motion sensors, and two suitable motion controllers right out of the box. Even cheap mobile VR platforms like GearVR or Daydream need to include extra motion sensors and/or controllers in order to function, whereas Nintendo's hypothetical HMD would need nothing more than some plastic and an elastic strap. They could sell it bundled with a Wii Sports/Nintendoland style mini-game collection for $/60 and at that point, even if it's a pixellated mess, I'd still jump on it just for the weird experience that would be Nintendo VR.