A computer game where both running-around-and-shooting and moving-body-to-a-rythm counts. Let two people play in team where one moves and one shoots. It makes couple with different tastes of game able to play together.
What it should look like and behave is not something I have figured out yet.
But hey, capoeira is something like it, and with wii and kinect we should be able to make something up. Dance electric boogie and send godly laser beams against your enemy. Dance battles in hip hop style.