I'm glad they went back to turn-based gameplay. Super Paper Mario was a great game and, well, it spawned this website, but I'll love the turn-based Paper Mario games a bit more.
im glad they added the joystick to the 3DS, it should make movement in the game alot more fluent, also i've got a pretty good feeling that the bottom screen will be used mostly more menus and action selecting in battle, thats how i'd make it anyways.
Here's some more screenshots: