NSMBU: Pretty much what I expected, I can play it for about 20mins then i get bored.
Zombi U: I find it to be pretty awful, repetitive, and I hate the ridiculous amount of artificially vignetting that makes that game hard to see.
Nintendoland: Very pretty, very boring. Games that either control poorly, annoyingly, or that I've already experienced on my iPad.
Youtube app: Nice!
Netflix: Nice!
That's pretty much it, nothing else to do with the system. I'm pretty thoroughly dissatisfied so far. Nintendo needs to bring some amazing games in the next year... true modern classics, not just "good enough" experiences any more.