I purposely did not view a Vita in person, until i got home with my Wifi Vita this afternoon, it was AMAZING! :D
The Vita looks slick from every angle, the audio crystal clear, the screen razor sharp with an impeccable bezel, the face buttons and D-pad have that perfect amount of click to them when pressed, the shoulder buttons have a nice trigger feel to them when pressed, and the Analog sticks are the best of any handheld device to date.
There are some quirks to the system, like the lack of ability to use buttons to navigate menus, hide icons, make folders for icons, medium battery life, and ergonomics to using touch controls with regular controls (I imagine the first few can be fixed via firmware, and the latter two via a power grip accessory).
But as far as actually playing games on the system; it is a dream, and I never want to wake up! :P