Unlike any other gaming consoles in the market, the Wii is definitely action-packed. You don't have to just sit down on the couch and press buttons. The player must stand and move realistically. A huge space is needed for huge movements depending on the game being played. For better gaming experience, a huge monitor or screen is highly recommended as well.
Also, unlike other consoles, this one openly promotes health and fitness. There are different kinds of sports, yoga, fitness exercises, etc. that players can enjoy.
Plus, it's cheaper than XBox and Playstation.