I think that is exactly the point of the comment you are replying to here. HN is a place where you would think people can see the use case opportunities and extrapolate them into the future based on the featured article's assertions (like getting access to a PPD of 55) and what that all means in the long term.

Spatial computing will bring about a fundamental UI/UX design refactoring of established 2D applications we just take for granted as fully baked. It won't replace them, like screens didn't replace books, but it will allow for enhanced functions we didn't know we were missing until they were in front of us and it will be offered in a more delightful human centric experience at the same time. HN dogs can bark but the caravan is rolling.

I doubt it. Navigation in 3D space is far more awkward than 2D. Depth is hard to get accurate, and you now have to deal with things closer to you obscuring things behind them. It's slow and awkward.

Improving this space isn't dependent on new technology either. We don't need more fps for them to solve the UX problems, they could've been solved for 3D navigation on a 2D screen - but they haven't, it has always been easier, faster and more accurate to navigate a 2D space.