I liked Nancy Kress' sci-fi suggestion in her "Beggars of Spain" sleepless series. Gene-enhanced people who no longer need to sleep (along with more future gene enhancements) find speaking too slow. They begin to craft thought objects that they transmit to each other that express whole spheres of information at once.

Wouldn't the interface that was developed using book-based prediction, where the user just navigates forward towards the most likely letters/words, completing the words/sentences, be a step forward along this approach?

(Sorry, I can't find the link, but I know I read about it and watched the video from a link on HN).