I've recently been reading lots of books about 50/60/70s computing & especially the San Francisco element of it, so I've been watching Engelbart's demo myself on and off for the last few weeks. It really is amazing being "close" to all this time of history, even if the only way we can interact with it is over USB nowadays!

Tiniest footnote correction but not only were the desk & offices designed by Herman Miller; the chair Engelbart is sitting on during the demo was also specially designed by Herman Miller!