I'm all for playing a Layton knock-off while waiting for the real Layton game to appear at an unspecified date this year. Also, I find it amusing that they made sure that Lautrec is an archeologist, just like Layton, but they went out of their way to give him a higher educational degree.
So far, the Internet seems excited about this game because Doctor Lautrec has a righteous mustache. Unlike Layton, he is rocking the facial hair, and it's definitely paying off for him. His sidekick is a beautiful young woman (a potential love interest?), not just some random kid. Unless the preview is lying, it seems that the good doctor has two beautiful young women as sidekicks. And he has a monkey sidekick as well. Doctor Lautrec's house is apparently Sidekick Central.
Also, judging by what we see of the two main villains (shown at 1:22 in the video), it is clear that the game's producers went out of their way to find the worst British accents possible. This game has to be a success, and I'll make sure to buy it when...
Wait, it's only being released on the 3DS? Oh, no way! Give it a dual 3DS and DS release! Actually, they should do that for a lot of 3DS games. I think the results of such an experiment would be surprising.