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Apple fans are starting to return their Vision Pros
(www.theverge.com)
This is a most excellent place for technology news and articles.
I think they mean a full windows OS for AR, which doesn’t currently exist.
Hololens 2 still exists and runs a highly modified version of Windows, so it does sort of exist. But obviously there's no chance of running desktop apps on a Hololens.
Hololens is what they're discontinuing support for and removing from future updates to the OS.