Nintendo is really going to have a hard time recovering from this one. A lot of people are saying that Sony and Microsoft are "copying" Nintendo by bringing motion control to their consoles. However, based on the chart posted by Winty, that's not exactly the correct word to descrive what Sony and Microsoft have done.
They have taken something originally innovational from Nintendo, and have improved upon it entirely. Now of course, I'm sure there might be some categories where the "Wii-Mote" exceeds the Move and Kinect, but at the end of the day it really seems evident that Sony and Microsoft have now dominated the one market Nintendo has relied upon.
I can't wait to get my hands on the Move and Kinect, but I'm also interested to see how Nintendo will retaliate. Maybe they won't do anything, but if they're a smart business I'm sure they will try and come up with something to help the Wii have some stance in an already lost console war.