A demo of what Jobs actually saw and "stole" when they visited Xerox PARC in Palo Alto. Xerox Alto gave world a lot, although Xerox failed to commercialize it, but Jobs did not. The presentation is actually made on the actual system running on emulated hardware.
What's interesting to me is that the idea of software internet is still not fully realized. Who wouldn't want to work with software like this?
Skip the introduction to 2:15.