Pretty much what everyone else said.
I bought a Wii U on day one with nsmbu, call of duty black ops 2, and Nintendo Land.
I think I was back to playing on my Xbox 360 before the day was over. You can't sell a PS3/360 console with no compelling software, lackluster online, worse performance, and a higher price tag. It was suicide.
With that said, I really liked the game pad . It made a lot of games more fun and playing two players in the same room with my own screen was pretty awesome.