[AustinLin]

If you have not watched at least that first 30 minutes of Engelbart's talk, I would recommend you stop what your doing and watch it right now.

In an hour and 40 minutes Englebart demonstrates input via mouse, video conferencing and collaborative editing among other things. This was before the internet, before UIs, before the idea of personal computing. Incidentally the most profound thing about this demo is not the technology demonstrated but rather the introduction of the concept of personal computing. At a time where computers were reserved for number crunching Englebart envisioned a future where they would be a part of our daily lives not controlling us but enhancing our abilities.

A quick side note, it is worth noting that while Englebart was certainly the visionary, his partner Bill English brought Englebart's visions into the world.