No, at least I don't. I just don't want a WiiU for Mario and Pikmin only when I have over a dozen Wii games to beat.
I will get a WiiU probably by next years Black Friday/Boxing day. I want to be on the band wagon this time for Smash Bros and Mario Kart, play them while the hype is still there. However I'm holding off for now, waiting for X the most, then I have no excuse not to upgrade.
As for other owners, I can understand why people aren't upgrading. Most of Gamecubes games were a flop, and the ones that were great (like Metroid Prime) didn't sell well on Wii. Now WiiU is making new iterations of recently successful titles, like Mario, Mario Kart, Wii Fit, and Smash Bros. I don't think the casual audience needs a new iteration of the same games so soon yet, especially since they were all so good on WiiU.
Plus like many say WiiU doesn't have that Killer Ap yet. Sure, Super Mario 3D Worlds is amazing, but it's not new, it's still another Mario Platformer, and it actually got a lower score then the 2 Galaxy games. WiiU has no Wii Sports like the Wii had before it.
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If Nintendo wants to make the WiiU sell, they need to reintroduce more IP's like Pikmin. They need to make a new Wii Sports game (something that can be released at retailers) a new Metroid Prime game, a new console Animal Crossing, a new Starfox game, maybe even a new Earthbound. A new IP wouldn't hurt either.