I definitely expected e-ink to be more prolific, and, when I was younger, I saw this EEG device which was initially marketed at gamers as an alternative control

I definitely expected e-ink to be more prolific, and, when I was younger, I saw this EEG device which was initially marketed at gamers as an alternative control device for computers and for some reason was sure that this was the future, even though a little reading revealed it was pretty impractical.