I haven´t seen the conference, I´m not waking up in the middle of the not for video games (Qhich weren´t even shown, apparently), so I´ll comment on what I read on Gaf so far.
I expected memory card prices equaling highway robbery and PSP like battery life at most. As I said even before the 249 price was announced, 300 for the Vita was my cutoff point for getting it at launch.
So, I´m not positively surprised, but also not shocked and I will still get it day one once it hits Europe.
It has has Hot Shots Golf and an Uncharted game for launch, best launch eva!
Edit: Having such a battery pack in my backpack for train commutes doesn´t even seem a horrible idea, unless it gets hot.