Native modding support for custom input controls?

[azaghal]

It would be nice if the game (modding) scripting engine were to provide out-of-the-box support for defining custom input controls in the game (that could be rebound etc via game settings etc). Currently the only option is the Hotkey API which is both Windows-specific, and requires an additional external application to run that actually listens for inputs.

What are the chances of something like this getting added to the game's scripting/modding engine?