No.

I got a Wii U at launch, which I wouldn't do now that I've owned it. But if I didn't own it, I definitely wouldn't buy it for Mario Kart because while I enjoy Mario Kart to a degree, it's not a game I like enough to buy a system over.

Mk8 will surely push Wii U sales as well Smash Bros later this year.

Hopefully this triggers an overall sales boost long term.

I still don't understand those who say, "Looks awesome, not enough to make me buy a Wii U". So what is? It still has the most exclusives. It has the highest rated games. Again, what is it? Oh, that's right. It's not a shooter machine. Oh well. Forgot about that.

You don't pay much attention to the games do you?

Madden and COD have incremental changes... MK has large improvements and completely new gameplay styles/options. Kinda why there is only ever one per console.

I've never played a Mario Kart game. I think I'm unique.

Longevity perhaps?  I am sure most consumers would like a device that will last a while (especially one commanding a 300 dollar price tag) and there is no guarantee that the Wii U in its current form will provide that, especially given the vibe from Nintendo and 3rd parties.

Yes.... just bully uninterested consumers into agreeing with you. That's how capitalism works.

It's not going to have the most exclusives for more than a couple more months. It's a console that's getting like four retail games every two months. It's not enough for most people.

I think it will move around 500k extra consoles in the launch and around 2 million extra consoles in the long run. It really looks like a lot of fun, and it is, of course, gorgeous.

And to answer your question: I will not, but because of money, maybe in december. (PS: In Brazil the WiiU costs 800 dollars).

Very simple.  The Wii U doesn't have Knack.