Mods can't do that sort of thing. We can't tweak the actual game engine(which is what it would require) with our mod tools.
Also the only people who would want motion sensing are 360 people anyway, maybe a few PS3 users.
Well thats just an idea for mod like Logitech G15 LCD plugin for Oblivion, thats not need to be done by developers for vanila game
http://tesnexus.com/downloads/file.php?id=11685
http://tesnexus.com/downloads/file.php?id=12236
On some stage of modding will be developed functions for alter engine hardcoded features like OBSE and plugins this awesome utility can show you this in Oblivion.
For example some modder interested in this can add support of Razer SixSense or even kinect or wiimote to game
For example an old but awesome game Die by the Sword
http://www.youtube.com/watch?v=ge96uISNrNM
Well, actually...
This is something that OBSE is quite capable of doing, you don't actually need to alter the game engine at all, it's a case of giving the game the inputs it normally has, triggered by actions. You could check what's under the crosshair to enforce context sensitive actions, too. If somebody was to put the effort in, you could run Oblivion from kinect right now - even with one of those fancy feedback vests, so you're swinging your sword with your arm and feeling the hits on your body. It will never be done. It's a ridiculous idea. You could approximate it with one of the tools already existing to translate kinect input into straight key inputs, though.
Thats it, if some one have great inspiration there is no border for them, expect of time.