To include my self into the discussion.
I am still waiting for my Wii U (I've got it for 250 euros in Germany - Mario and Luigi bundle and it did sell out in a few days from the shop who was selling it), but the thing I am probably looking most to is the game pad, as I will be able to play it away from TV. Don't get me wrong, I prefer to play it on TV, but because of a specific situation, I usually only have time when I go to sleep (so can play it in the bed for half an hour or a hour), or when my daughter is a sleep and she often sleeps in the TV room, so I can't use the TV.
The pad is almost like a second console and I don't get it why is it a problem for people (I didn't use it yet, so maybe I'll find out).
Also, I think that Nintendo needs 2-3 more big games, shooting games (Splatoon could be the one, Starfox), RPG (Xenoblade Chronicles X could be that one), or a horror game (they need something for that), while they really have a good collection of other games (Mario bros, Super Luigi, Mario 3D, Mario Kart, Smash Bross, Zelda, they have some shooters nice shooters, Lego City Undercover, Bayonetta 2, Monster Hunter Ultimate, Batman Arkham City, Pikmin, Donkey Kong, Rayman, Captain Toad, Kirby, Wonderfull 101, Hyrule Land, some popular "old" games, lots of indie games and they also have some sports games but not the newest ones) and when the 2-3 games are out they should start again a massive advertisement with nice prices (nothing to low) as people still think that there are no games for the Wii U.
I am sure a new marketing campaign would sell a good number of consoles as now they do have enough games they can show (and they have to show it during the marketing campaign).