A look at the challenges of developing a mass-market augmented reality headset as Apple reportedly prepares to launch its own mixed reality device in 2022 (Christopher Mims/Wall Street Journal)

Christopher Mims / Wall Street Journal:
A look at the challenges of developing a mass-market augmented reality headset as Apple reportedly prepares to launch its own mixed reality device in 2022  —  An augmented-reality headset or smart glasses could become the tech giant's next big thing  —  If you thought the hullabaloo about Facebook …