[AlexandrB]

Unifi has an AR app for working with their switches[1] that shows some HUD info for each port. I've never used it on my switches personally and judging by that video it's more trouble than it's worth. But it exists. I suppose in a large data centre this might be useful, but the technology still seems pretty immature.

[1] https://www.youtube.com/watch?v=0dlB-UAhTyw

[fl0wenol]

Related tech that got traction is BLE in servers with corresponding apps, like Dell Quick Sync. Lets you flash the ID light of a server from your phone, among lots of other things.