What I said was that VR gear won't replace smart phones in the next 10 years.
So it isn't about presence (after all, we have and have had VR/AR/XR equipment for quite some time now), but rather about relative ubiquity and obsolescence of what came before (in this case, replacing smart phones).
I might have a blind spot here (or lack imagination), but I think some of the reasons why I don't see these glasses making mobile phones obsolete in a 10 year time frame as a confluence of:
- people in the US by and large prefer not to wear things on their faces (is it seen as weak, esthetically unpleasing, sign of old age?)
- mobile phones (and smart watches, etc.) provide a good balance between mobility and utility
- if VR/AR/XR moves to contact lenses, the first point goes away but you will still need input mechanisms etc. and I doubt that contact lens formats will be able to supplant photographing/video and music playback which has become such a big use case for mobile phones.
Arguing against myself (somewhat): I think for VR/AR/XR to be truly successful, you need to feed the experience directly into the brain because that gives you high fidelity, high mobility, and removes the physical barriers that a contraption on your head brings. But that is even further out than 20 years, assuming humans don't retaliate against the idea of interpersonal communications that is so heavily mediated (read: manipulated) by a company (this happens in social media already).