Using Glass in a factory environment surprises me. Factories are notoriously loud, so unless Glass is really good at filtering out background noise, I'd imagine that voice commands wouldn't work very well. My experience has mostly been consumer electronics factories in Asia, but I also see the following problems that may or may not apply to domestic factories:

* Equipment with clear resale value has a tendency to "walk away". We worked hard to avoid using consumer electronics such as PCs or phones on the line. When we did need to use them, we had to establish strict policies and secure storage for when the equipment was not in use. Glass seems like it'd fall in this category.

* Even dedicated, laser-based, handheld barcode scanners could be finicky with part labels. Camera-based scanners were unusable due to poor accuracy and latency.

* Internet connectivity is poor or non-existent. WiFi coverage is usually terrible due to physical and electrical interference from factory equipment.

AR work instructions would be a dream--especially if the technology could flag errors. The environment just seems especially hostile for consumer-oriented technology such as Glass. I don't have firsthand experience with Glass, but I'm really surprised this company is reporting success with it.