Used to be, a guy could sit comfortably on the couch and, by mashing a few buttons, make onscreen characters do all the hard work. Nintendo changed all that with the Wii. Suddenly, if you wanted to bowl or play tennis or help Mario save the galaxy, you had to stand up (gasp!) and move major muscle groups in a coordinated manner (heresy!). All those years of disciplined training to develop Thumbs of Steel (and Buns of Marshmallow), and Nintendo changes the game.