Functional Reactive (web) Programming
He showed us something live - essentially the thing I'm doing in this sub-one-minute video.
From some of the questions asked afterwards, I gather that the concept may not be a new one, but I don't care - I'd not seen it before, and the idea blew me away.
In the video, I show the scheme setup. The good folks at Brown have also seen fit to furnish us with a web programming setup which works on all the main browsers right now.