Famitsu recently spoke with some Japanese developers on their opinons about the Wii U.  Here’s what they had to say:

Hiroyuki Kobayashi (Capcom): He’d like to consider something that makes use of space (like the room you’re in, etc.)

Suda 51 (Grasshopper Manufacture): Acknowledges that No More Heroes 3 is widely anticipated, but that he has nothing specific to say.

Keiji Inafune (Comcept): Views Wii U as a challenge from Nintendo. If he has the chance, he’d like to respond to the challenge.

Kenichiro Takaki (Marvelous): Said that the Wii U gives the chance for many unique ideas — using the control pad to observe bishojo girls, for instance. (Note: Takaki is responsible for this game.)

Jiro Ishii (Level-5): Said that he’d like to make a table talk-style game.

Akihiro Hino (Level-5): A Professor Layton game where you walk around a 3D London would be interesting, said Hino. He was at first worried that the control pad would be heavy, but there was no problem when playing briefly.

Ryoei Mikage (Imageepoch): He’s considering making software that puts the system’s various qualities to use.

Link