To do work with your hands.
I was just in a datacenter deploying a bunch of infrastructure while coordinating with remote network operations and sysadmin teams. It was damn annoying having to constantly check my phone for new slack messages, or deal with Siri reading back messages in it's incompetent manner. I missed quite a few time sensitive messages like "move that fiber from port A to port B" due to noise or getting busy with another task and kept folks waiting for longer than needed.
In limited circumstances having a wearable "HUD" interface would be quite nice. Especially if it had great screen quality and I could do things like see a port mapping/network diagram/blueprints/whatever while doing the actual work. Would save considerable time vs. having to look down at a laptop or phone screen and lose my place in the physical wire loom or whatnot. Having an integrated crash cart (e.g. via wireless dongles) would be even more exciting.
That's just one recent task that comes to mind.
There are plenty of real world hands-on jobs where this would be quite helpful. So long as it's not connected to meta or the cloud or anything other than a local device or work network.
For a more general use-case I have what amounts to minor facial blindness/forgetfulness of names. I need to study your face for a long time over many interactions to actually remember you. Something as simple as wearing glasses vs. not can mean I will not recognize someone I've spent months interacting with multiple times a week.
I've long wished I had some way to implant something in my brain that would give the equivalent of video game name avatars superimposed over someone's head. For totally non-nefarious reasons, just names of folks I previously have met pulled from my contacts list. Obviously this is unlikely to ever be a socially acceptable thing due to recording and other potential abuses - but I have thought this for at least 25 years now - before the privacy concerns became obvious. Wishful thinking, but I can imagine myriad of uses for such technology if it didn't enable such a wide-spread number of potential abuses.