Is The Wiimote Hurting Wii?

While I was cruising around the internet, or surfing, as some people say, I came across a video of somebody playing Half Life 2 using a Wiimote through its Bluetooth functionality. This made me think, if people want immersive gameplay with a pointer and motion sensitivity and all that jazz, why spend money on a Wii when you can just buy the controller, run some scripts and have a jolly old time. Also, by the looks of things, the graphics on your PC (or Mac) would be better than the Wii. I'm not saying that the Wii sales are going to nose dive, if anything, good old Nintendo is going to snag some extra cash selling Wiimotes to folks on an Alienware playing Quake 4 instead of Redsteel.