One controler per console. That's a little bit contrary to multiplayer/family oriented entertainment Nintendo aimed for since ever.
Also, Wii U probably won't be superior than X360 and PS3, so that means that when the next gen arrives, Wii U will already be old, surpassed. Just like Wii is. And this time, they don't have that motion control gimmick to compensate that. They have nothing truly new, original or that really adds entertainment value.