Looks like a pretty sweet AV setup was used. Did they utilize any IMAG or were the side screens used strictly for prerecorded footage?
The side screens were used for image magnification of the hosts and, kind of like Oscars, had guys on the floor with cameras ready to point at anyone who was walking up to the stage to accept their award. Pretty snazzy production. The center circular screen didn't really have much other than prerecorded text.
Oh, and the side screens would cut to trailers and such for nominees and the occasional Mega64 transitions.
Gamespot had it streaming, so I think everything on those side screens was probably what showed up in the videocast. If you have time to watch it (
http://www.gamespot.com/events/gdc-2012/video.html?sid=6365134&category=highlights), the Warren Spector speech was pretty good.
I was hoping they had the IGF awards on the site, too, this year, but I can't seem to locate it. That one was actually a little better in some ways, but maybe because it wasn't all the big names we've already heard over and over again.