Google Glass sales halted
Google Glass took a good idea for some contexts and mass marketed it to a completely different context where it's primary feature was mostly useless. HUDs and AR make a ton of sense when you need to augment human knowledge, intelligence, and sensory in real time with voice as the primary user interaction. Flying fighter jets, driving race cars, fighting on a battlefield, working in complex and unsafe industrial operations, etc.AR doesn't significantly augment your experience of riding the bus to work, ordering dinner at a restaurant, taking a walk around the block, or even most forms of labor (manual or otherwise). So not only did Google Glass not have much of a benefit, but it had the drawback of annoying countless people who had to be around the glasshole who never stopped yapping at their glasses.