The intrusion to brains has already started. Schools in china are experimenting on using brain-wave trackers to track whether students are paying attention in class. But the parents do not seem to care. It is likely to give false readings so the accuracy is unclear.
The picture is scary. They do not seem to care about the privacy issue even though the benefits are unclear. They are OK to sell out for ... maybe nothing.
https://hongkongfp.com/2025/09/19/hong-kong-to-evacuate-6000...