Google Glass is back, and this time it's not the ultimate example of overhyped wearable technology. Rather, its revival demonstrates how Silicon Valley's innovations can have applications that their creators might never have envisioned.
The first coming of Glass – a computer in the shape of a pair of glasses – was a disaster. It occurred at the height of the wearables boom in 2013, when some 318 startups emerged to push smartwatches, smart glasses, smart clothes and other such gadgetry, more than double the number a year earlier. Google pitched the product for a wide range of consumer uses – whatever you could do with a smartphone, only look, no hands!