If you haven't yet seen this video, please do: https://www.youtube.com/watch?v=8pTEmbeENF4 (Bret Victor The Future of Programming)

This won't tell you who he is, exactly, but it does give insight into how he thinks. And it's a pretty great talk, in my opinion.

I'm afraid I don't have time to watch some video -- please provide a 3-sentence synopsis here.

Thanks for posting this. I was not inclined to respond after already providing information that he could have viewed when time afforded him. Here's hoping he has time to read a Wikipedia article instead of having people do the work for him.