SEGA's Rhythm Thief & The Emperor's Treasure has been described as what you'd get if Elite Beat Agents and Professor Layton had a baby. Which sounds perfectly awesome to me! Raphael is a heroic thief in Paris, who steals counterfeit paintings to replace with the originals. You'll explore Paris and dance your butt off to solve mysteries and find your missing father.
From the brief teaser trailer, it seems that they've realized the same thing that Natsume did when they decided to port Gabrielle's Ghostly Groove from the DS to the 3DS. If you want people to be paying attention to the 3D screen, you can't have complicated tapping and swiping on the touch screen like with Elite Beat Agents. So it looks like it will be directional buttons and generalized tapping instead. Which is great! Then you can watch the dancing instead of the buttons!
Now, if only we didn't have to wait until some unspecified date in "early 2012" to play it!