Hello Everybody and Happy 2013 to you all. Just today, I have received the Wii U in the mail, and I have to say that I'm enjoying it a lot already. Of course, the features on the console are like it's predecessors the Wii and the Nintendo 3-DS. It has the ability to connect to the internet (of course) and the ability to create Miis and even check into a place where you can meet other Miis called the Miiverse and even an E-Shop Channel where you can download old games and even add DLC to disc games as well. You can also access NetFlix and Youtube on the Wii U. There's even Nintendo Network (though not new or unique to the Wii U). You can also connect your Nintendo 3-DS to the Wii U as well.
Though I can't help but negatively criticize the controller that comes with the Wii U. The thing is quite big (which can be quite hard to hold if you have small hands), and it also looks a lot like a miniature I-Pad (because it has a touchable screen in the middle) But it does have an edge over some of the other controllers like the Wii Remote, you don't have to worry about burning out your arms or hitting anything because the controller doesn't require swinging.
On the more possitive side, the Wii U (this version anyway) is backwards compatible, you can play regular Wii games on it as well as use the Wii Remote, though the same story can't be said about Gamecube games because you can't use the Gamecube controller with it.