glass

Glass became the nickname for any AR headset based on the product Google Glass. It is a wearable computer with an optical head-mounted display that allows for hands-free, head-mounted wearable computing. 

Historical perspective: Google Glass eyewear was first released in 2013 (and cost approximately $1500) but by 2015 it was pulled off the market. Many attempts came and went and as of 2023, people still were not replacing computers with glass.

FYI: In aviation speak, a "glass" aircraft is one that has a digital cockpit, as opposed to a "steam gauge" or "rope start" cockpit with analog instrumentation. For example, "Since moving up to glass, I'd never want to fly an old steam gauge again."