I made no attempts in my post to assume that motion controls would do anything for the HD consoles, and in fact, I think motion controls will not help expand the userbase at all for either HD console. They will be neat, but they will not be a marketshare changer.
I was just merely stating that they were quite obviously vital to the Wii's success. Sure there were other elements in there(such as Nintendo software), but the motion control element is quite obviously the main grabber for the Wii's market share.
Without motion controls, it is just a GameCube.







