I was with you until you said gimmicky motion controls. Every console, controller, and game is a gimmick. Consoles (great power, beautiful graphics, DVD/Blu-ray, and online capabilities) are a gimmick. Controllers(buttons, pad, sticks, motion, and touchscreen) are a gimmick. Games (FPS, RPG, Platformer, Movie based, storytelling, and action/adventure) are gimmicks. The talk of third party support makes no sense. All consoles have third party support or all games would be by first party and the rare second party companies. It isn't whether Third party support will be on the Wii U but what kind of third party support.
I'm sorry that you don't like my terminology, but that's really beside the point. What I was getting at is that motion controls tend to not really enhance the core experience. The WiiU on the other hand the potential to add depth to a variety of genres in ways that we've never seen.