Would Google Cardboard count? What about a 3DoF headset like an Oculus Go (but lighter)?

@EMcNeill Good question! I believe he was talking about an all in one headset, so Google cardboard would not count. I don't think he specified DoF so an Oculus Go like headset would count. (Although that might not be what he intended)

@JakeToth That reminds me: what about headsets that are run from a separate computer, like most PC VR headsets (but potentially wireless)? In context, that’s not what Carmack was talking about, but it would be considered a VR headset by most any definition.

And what about “AR glasses” that don’t block out the real world? What if it can do VR, but is primarily marketed as an AR or MR device?

What about media viewers (like the old Vuzix headsets they used to advertise in Skymall magazines) that can track head motion but which aren’t marketed as VR headsets and can’t play games?

@EMcNeill Now that you mention it the boundaries of what counts here does get quite fuzzy!

I would only consider standalone headsets, so not headsets that require a PC. I guess I would consider AR glasses that do VR? Especially because pass through makes VR headsets AR capable! I would not consider media viewers to count.