At the Mobile World Congress (MWC) in Barcelona, Xiaomi unveiled its new prototype Wireless AR Glass Discovery Edition, which weighs 126 grams and has a “retina-level” display.

Smart glasses with a display have been a dream for years, but attempt after attempt has failed to deliver. Things are looking brighter, and more options are coming to market over the next year. At ...

Xiaomi's Smart Glasses. That's a camera on the right of the picture and the display system on the left. That blue area in the lens is the waveguide display.