I think the most impressive thing about this is; 1. he predicted 3D CAD design i.e. the architect designing the perspective of a building and then asking to see the interior (on 3ft (36") wide display aka 42" (diag) monitor, unheard of at that time!), 2. he predicted AI assisted work i.e. asking the computer to tabulate information, to predict if light would hit a certain window and at which time.. 3. (pg 13) he predicted GPT predictive text, where text is gathered from a corpus of old draft documents and used to generate a reaction to prompts, 4. page 25 mentions a 3D color display device, 5. page 26 he strapped a pencil to a brick and tried to write with it because he wanted to think about what other beings who had different muscle structures than ours might have had to contend with in order to write symbols, 5. page 28, the concept of storing an entire dictionary and other information in a handheld device with a small display that anyone can quickly look up information in less than 3 seconds on the go and how that would propel humanity forward, 6. page 35, the concept of quickly translating data from one form to another, e.g. tables, graphs, formulas.. which we currently take for granted in today's spreadsheet and word programs. 7. page 36, moving graphical windows of information around and switching between 3D perspective and 2D orthographic mode of the same image data. 8. page 37, the cutting, pasting and stretching of image data, 9. page 41, concurrency, 10. page 48 - 56, attributed to Vannevar Bush - voice recognition / digital dictation, scanning images into a machine, searching for content via words instead of numerically, word processing, swiping left/right, the computer in a desk with screens, remotely controlled PCs, storing and sharing of data via microfilms, the average person creating a wikipedia / internet to assemble and lookup of information, transmitting video/images wirelessly, tapping into the eletrical currents in the the brain for thought recognition and control of a machine. 11. page 64, self-modifying programs and page 67 magnetic floppy discs, page 68 graphs, a laser pointer, duckhunt gun, page 69, handwriting recognition

The rest of the document after this seems to lose the plot and focuses heavily on punching holes in cards, computer timesharing and trying to comprehend the best and cheapest ways of storing data.

I'm still reading the document I'm sure I'll find more interesting predictions. This is a pretty groundbreaking document considering the year it was written. But, of course, he invented the mouse (which is mentioned to be a "pointer" in this document btw, a few years before he actually invented it) so it makes sense he'd have this kind of foresight.

BTW, the idea for the computer mouse seems to have come about because he was trying to brainstorm "de-augmenting" humans as a mere thought experiment, e.g. what if things were harder not easier due to limitations that humans do not possess because we never had to deal with certain issues. And, how would we have evolved our interactions with the world instead given those limitations, e.g. writing. This is a potentially new and interesting way to think up new concepts and inventions that might be useful.