If you include Zelda: The Phantom Hourglass, which requires you to close the clam-shell to continue past the first third of the game, it could be said that it does limit content...
It seems that a lot of people are generating FUD, again, because they want the system to fail.
The system is great, the games we have so far are fun, and that's probably about the same purchase rate as on the Wii. We have a PS3, but that is only used for watching movies, which I never thought would be the case. The games just aren't compelling.
The Wii U will do fine, and will sell many units when the 'big' Nintendo titles release.