Comment by mncharity

There's an old idea of adaptive media. Imagine a video drama that's composed of a graph of clips, like an old "choose your own adventure" book ("Do you X? If yes, goto page 45"). With gaze tracking, one can "hmm, the viewer is more focused on character A than B... so we'll give clips and subplots with more A".

Now, when reading, the eye moves in little jumps - saccades. They last 10's of ms, the eye is blind during them, and with high-quality tracking, you know quite early just where that foveal peephole is going to land. So handwave a budget of a few ms for trajectory analysis, a few for 200 Hz rendering latency, and you still have 10-ish ms to play with. At 20k tok/s, that's 200 tok.

So perhaps one might JIT the next sentence, or the topic of the next paragraph, or the entire nature of the document, based on the user's attention. Imagine a universal document - you start reading, and you find the document is about, whatever you wanted it to be about?