Naturalpoint offers their head tracking SDK to game developers and claims integration of head tracking support would be no big effort. ATM head tracking in TES IV is possible with keyborad/mouse emulation software and gives great immersion gain. I would love to see full support for tracking devices in TES V.

This is a link to the http://www.naturalpoint.com/trackir/05-developers/which-sdk.html. Hope someone takes a look at it.