Natal definitely has potential to revolutionize HCI, but I find it hard to believe it will help Xbox match the success of the Wii.<p>I cringe every time I see that video from E3 of that poor woman flailing on stage, swatting virtual dodge balls. Like Tony Hawk: Ride, when games start becoming too real, they tend to stop being fun.<p>Also, consider amputee or wheel-chair bound gamers who don't fit the typical body shape. Perhaps a small market, but a potential PR nightmare when Iraq veterans are told they don't have enough points of articulation for Natal.