Why Brain-Reading Devices Could be the Next Big Thing in Optimizing Your Life – WSJ – The Wall Street Journal

You’re feeling distracted and can’t get your work done despite a looming deadline. Your headphones detect your lack of focus and suggest you take a break, while a headband beams signals to adjust your brain activity and energize you. Crisis averted.  

That’s the future technologists imagine, and a variety of devices are being developed to enhance the brain’s performance in day-to-day life.