How different would this thread have been if the title had instead been "Is there any genre the WiiU cannot do well?"? The question about whether it can dominate some genre is completely irrelevant and just comes off as odd to me, for several reasons:
1) Dominating implies it's the best at some respective thing, but we have no idea what the competition is doing, so we cannot know if the WiiU is in fact the best.
2) K&M is arguably the superior control scheme for FPSs compared to classic console controllers (i.e. "dominating"), yet a series like Call of Duty is vastly more popular on the PS360 than it is on the PC. "Domination" in this regard then seems a bit pointless, when clearly it's not that essential.
3) You're assuming a Wiimote or Wiimote+ will be standard equipment for the WiiU, when in truth it's only an optional peripheral. How many developers will opt for utilizing it deeply in their games, when it's not standard equipment? It's hard to tell, and saying the WiiU will dominate something like FPSs because you can have both pointer controls and classic controls is a bit presumptuous to say the least.
Now, as for genres that aren't doable (or doable in good quality) on the WiiU, that's something else entirely, but I'm not going to try to come up with any genres for that right now. 
