Smart glasses are useful in many contexts, most of them enterprise-related. However, it is also possible to replicate the smartphone experience to some degree using some of these devices, Vuzix-brand ones included. This company claims that a new development will bring peer-to-peer video calling to its Blade devices.
https://www.notebookcheck.net/New-update-will-bring-video-calling-to-Vuzix-smart-glasses.427563.0.html