In terms of market penetration, they've done an excellent job with Wii M+. In terms of continued excitement or momentum, it's possible that they've failed to capitalize on it and excitement may be dead by the time they do. I really wish Nintendo had more prepared for the months after the arrival of WM+.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.