And then, 30 years later, came Siri and IBM's Watson... Winograd talks about three different metaphors for HCI: conversation, manipulation and locomotion. In t

And then, 30 years later, came Siri and IBM's Watson... Winograd talks about three different metaphors for HCI: conversation, manipulation and locomotion. In the 70's he gave up on conversation for manipulation, and was right do to so, but with modern computing power and databases, conversation is coming back as a relevant model.