A couple of points:
a) I agree on the lack of compelling software for the Wii U this holiday. I'm definitely interested in picking up Pikmin 3, The Wonderful 101, and Windwaker, but I also understand that 2/3 of those choices are fairly niche even for Nintendo owners. Donkey Kong, Scribblenauts, and even Sonic aren't going to pull in a huge audience. Mario 3D Wold is ok (together with Sonic is the best chance of gaining an audience), but without any push behind it, what's the point? Hell, I'm not even excited for Mario Kart, and Wii Fit U I doubt is going to be the magic pill for the 'casuals'.
b) On the handheld end though, I wonder if tablets are going to be quite as strong as they've been in the past. Last year we had a huge push by Amazon for the Kindle Fire HD tablets, ultimately selling at the same price and sometimes cheaper than dedicated gaming devices. Not to mention the growing craze of games like Angry Birds and Cut the Rope. Many kid friendly tablets were found to be unstable and ultimately a waste (as anyone who worked at Toys R Us can tell you). With Pokemon and plenty of options for the 3DS if the 2DS (confusing title and probably lack of marketing aside), I can see it performing far better this holiday season.