You know, this is probably possible through heavy modding, and I would love to see this in game, but I don't see it happening in the near (or far) future. If anything it would be low on their TODO list as they still need to do a lot of optimizations, etc... first.
Well, seeing how the engine already has ways to know if you are clicking parts of the geometry (I'm thinking about "ctrl" node grabber mode), it is definitely possible. Also a very common thing on PC-only simulators, specially flight sims. But as StinchinStein said, that's for sure not on the top of their to do list. Would be useful as hell on vehicles with many buttons and switches on them.
