It was an odd feeling to see nearly the exact thing that we've had in our heads for a couple years show up in the reveal... both exciting and underwhelming. It is as sleek as I hoped it would be, if a bit bland looking. Something we haven't yet seen are the goofy accessory controllers for different games. The biggest surprise was Skyrim.
One disappointment is that the dock mostly hides the screen. That implies that dual screen functionality like the Wii U won't be possible, unless they have some other way to do it.
Nile Boogie Returns, I don't understand the complaint. If you want to have multiple people playing simultaneously, that has always meant buying multiple devices. I guess you are concerned that the cost will be higher than current handhelds? The 3DS started at $250. If they go too much higher than that, they will likely kill the system before it launches anyway.