Whenever I read one of these articles/headlines, I wonder how/where can I get a device to measure brain activity. Some sort of fitbit for the brain (ideally with no connection to 'the cloud', of course).
I saw a group of cosplayers wearing these back then. Someone mentioned the name of one person in the group, and their ears went up. Watching someone play a video game showed them attentive while playing a level, and relaxed while the next level was loading. So, in a limited way, it worked.
(Problems were 1) cost, about US$200, 2) fragile mechanical design, 3) too heavy 4) short battery life 5) ears too big. Someone ought to try this again.)
The Muse (https://choosemuse.com/) is much more of a consumer-friendly device, and it was super easy to get working at a hackathon years ago, but it looks like they suspended access to their SDK.