Wii vs. Wii U

I got my Wii when I was in 3rd Grade. I was my Aunt's house and one of second-cousins was playing Super Smash Bros. Brawl. I wanted a Wii so bad. A couple weeks later, I finally got a Wii with two games: Wii Sports and SSBB for doing good in school. I had trouble with the Wii controls at first, but I eventually got the hang of it. I now own at least 20 different games in my Wii library.  But the question is: how good IS the Wii U. I personally don't own a Wii U because I feel it just a handheld version of the Wii. Sure there are some good games, but I'm just not all that interest in having the same old Wii with a new controller. So, in my opinion the Wii is the game system EVER!