Nvidia has shown a prototype Windows 8 tablet at CES 2012.



From Techradar:

The tablet packs Tegra 3, like the recently released Asus Transformer Prime. But instead of running Android 3 or 4, Nvidia is trialling Windows 8 – which is newly compatible with ARM-based processors like Tegra as well as the Intel and AMD line of x86-based chips.

  In pictures: Nvidia's Windows 8 prototype tablet