Check my comments here:
http://www.vgchartz.com/forum/thread.php?id=74912&page=1
Sorry Ubisoft failed to entertain you, but they weren't talking to YOU and I doubt they know YOU exist. AC2 was shown at the end (at least a teaser trailer was), and they laid out their business plans and what they are talking about. It isn't a bunch of yucks, but stuff for the INDUSTRY folk, not the FANS.
More on E3 here:
http://en.wikipedia.org/wiki/Electronic_Entertainment_Expo
When you are a buyer whose job depends on making the right decisions, having them show what will SELL counts.