I worked at Google on watches some distant time ago, these floated around.

IMHO the tell on why there's a delay is the original comment expressing wonderment at Zuckerberg demonstrating 30 WPM.

i.e. it sucks.

It's nice technology, engineering, glad they had the courage, sure its useful for its purpose.

However, in practice, humans being humans, the odds I regularly put on a glove, to get 30 WPM, on my glasses computer...very low.

(also, looking back at the original comment...neural interface? wtf? It's not neural...)