Where are Wii heading?

Activity-based computer games are the future, say Robert Colvile and Claudine Beaumont

Do you still think the sole aim of computer games is to turn your children into couch potatoes? Then think again. Wii Fit, which hit the shops a week ago, has been selling at a rate of 90 copies per minute, according to Woolworths, and represents gaming's arrival as a mainstream activity.