Hopefully the NX will be continuous with the Wii U in some way. I still love it as a system, hope they'll have many more great games for it. On the other hand, I wouldn't be at all surprised if they just finished making the current set of exclusives and then ditched it. Even if Zelda is the last big game we get, I think it's still a console worth owning. That's quite a lot of good games!
Honestly, they could have a console exclusive to the characters essentially in the Smash Bros roster (ie; a new Kid Icarus game, a new Star Fox Game, a new Fire Emblem, a new Metroid, etc.) and I think that's more than enough for most and they don't even "need" 3rd party support (in a matter of speaking). It's just a shame that hasn't been the case.
This E3 will really be interesting for them I think.
Also, just super-sayin, but I actually really liked the tablet for games that used it.