When and where was this? I had no idea this was on otherwise I would have gone. My luck I was probably working at the time. The building in the first pic looks like the Namba OCAT, if that's the case I would be pretty pissed as I work near there.
I went today. The crowd was decent and there was a few new games on display including a new NDS puzzle game. Oh, and Donkey Kong Jungle Beat was playable, too. 1UP.com should have my impressions up by Monday.