Xiaomi declined to say why this is a prototype right now when the tech seems to work so well. If I have to guess, I’d suspect it could be battery life or cost. During our 30-minute demo session the glasses ran out of juice and had to be charged. Maybe there’s no way to put a large enough battery without drastically increasing weight or bulk. The other theory could be that Xiaomi wants to wait until these glasses can be manufactured at a lower cost before releasing.
https://www.xda-developers.com/xiaomi-ar-smart-glass-hands-on/
How anyone who was working on this product didn’t see this obvious half-closed dead-eyed vacant expression only shows that no one with decision authority has any taste.