While the personalized parts can probably be bought for a whole household and swapped by the user, when including lens correction for instance it's just not practical and it becomes a single owner device.
1. How much room in the headset is there for glasses? I can wear glasses relatively comfortably in existing gaming headsets like the Vive, Index, and Quest.
2. What are the stats on likelihood of requiring corrective lenses across a group of people, and what subset of those exclusively wear glasses?
If I had a friend with one of these and they didn't accommodate glasses on the wearer, I'd just wear contacts to do a demo. If I were spending $3500 on a setup at home, I probably wouldn't scoff at an accessory cost alongside it to get lenses for a family member.
On 1., leaving space for glasses limits the FOV so I'd assume Apple is not leaving that gap (which would also justify the production of prescription lenses from the start, for a product that isn't even shipping yet)
On 2. I don't have the stats, but this study was interesting: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8569398/
> The distributions with significant changes included males that were significantly more myopic and astigmatic, while females were more hyperopic across the age groups. Furthermore, myopia decreased, while hyperopia, astigmatism and anisometropia increased with increasing age.
So,
- parents and children have a high probability of having a different correction
- A man/woman couple has a high probability of having a different correction