Inventing the Future | Oculus

From an extensive AR reality check; tangentially, see Tim Cook says the tech “doesn’t exist” for quality AR glasses yet (Ars Technica)

"While AR glasses have the potential to be one of the most important technologies of the twenty-first century, that won’t happen unless some very challenging practical constraints are overcome. They must be light and comfortable enough to wear all day, run off a wearable battery for many hours per charge without getting uncomfortably hot, work in full sunlight and in darkness, and have excellent visual and audio quality, both virtual and real. They must be completely socially acceptable – in fact, they need to be stylish. They need an entirely new user interface. Finally, all the rendering, display, audio, computer vision, communication, and interaction functionality needed to support virtual objects, telepresence, and perceptual/mental superpowers must come together in a system that operates within the above constraints. [...] 

There is no combination of existing technologies that meet all those requirements today. The honest truth is that the laws of physics may make it impossible to ever build true all-day AR glasses; there’s no Moore’s Law for optics, batteries, weight, or thermal dissipation. My guess is that it is in fact possible (obviously, or I wouldn’t be trying to make it happen), and if it is possible, I think it’s highly likely that all-day AR glasses will happen within the next ten years, but it is an astonishingly difficult technical challenge on half a dozen axes, and a host of breakthroughs are going to be needed."

Inventing the Future | Oculus