Tailored to next-generation form factors, Windows 8 will allow users to interact with their devices via a variety of input models, from the traditional mouse and keyboard to touch.

By extension, applications running in Windows 8 will also be NUI-friendly, as long as the devices themselves will permit it.

Essentially, when taking advantage of Windows 8’s natural user interface capabilities, developers will be able to incorporate motion-sensor input into their projects.

Windows 8 Accelerometer, Inclinometer, Compass, and Gyrometer - Softpedia

Sounds good !

So Wii players will be able to use Wii in windows 8.