Will Nintendo do fine this holiday? Yes. Will WiiU dominate? No.
WiiU will be on third place this holiday (and 3DS on first in handhelds obviously), still Nintendo will have fine holidays. Amiibo and Smash will secure that. That doesn't mean WiiU will be magically first in a moment.
WiiU still is the best choice *for me*, as this system has games I care about and that I can't play on platforms I already owned before WiiU.