I'm confused on your phrasing of "they explicitly never will be."

Those prototypes, of course, aren't going to themselves be shipping. But they are for R&D and to provide example of a nascent technology that one day should end up in a consumer product.

You absolutely can disagree with the approach of showing this too early or not trying hard enough to incorporate this into an (albeit expensive) consumer product today/soon.

But my read is Meta wants this stuff to one day be in consumer headsets. Just not there yet.