Waggle
The gimmick was honest: hold a remote, move it like you mean it, and your character moves with you. I saw the Rayman trailer and thought this is stupid and wonderful, this is how games should feel. Not sitting there watching a screen but actually in the room, moving your arm, swinging at things, jumping around like you’ve lost your mind.
Motion controls never really worked, of course. Too imprecise, too tiring, too easy to get wrong. But underneath the whole thing was a genuine impulse—wanting to close the distance between your body and what happens on screen. Nintendo fumbled it. But they were reaching for something true.