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Microsoft is discontinuing Windows Mixed Reality
(www.theverge.com)
This is a most excellent place for technology news and articles.
Absolutely, if it's essentially just a pair of regular glasses. Anything bulkier and it becomes fatiguing.
We're still probably a decade off of AR glasses that size, but they're getting there.
An entire decade? There are several available to consumers. I'd say 2-3 years maximum for the perfect fit.
Example: https://www.visor.com/