i think that's the incorrect conclusion. people weren't attracted to motion controls because they were motion controls. people didn't buy move like they did the wii remote or kinect, because sony's designers didn't really grasp what people were after. people wanted accessible, easy to understand gameplay and at an affordable price. nintendo and microsoft put that in their platforms from the start. and it was something parents wanted because it wasn't a shootbang thing or at the very least it was something that could be done as a family.
motion controls then became an industry standard. every company aside from microsoft now has it standard as part of the controls in their system. it's part of every major mobile device too, along with touch screens. if you look at wii sports, brain age, nintendogs, wii fit, udraw, and kinect as part of this rise in accessible, novel, and different kinds of games, then mobile is the continuation of that. more, mobile rose just about the same time interest in the wii and kinect waned. the real takeaway here is that a major former segment of the dedicated gaming market left, along with several others, almost all at once. now we're going to be left with overall sales not just worse than the last generation, but the generation preceding it too.
i know people like to think this is a 'consoles are dying!' narrative but it's really more that the dedicated market is in danger of becoming irrelevant in the industry. on its current path, it appears that it's the only logical conclusion.