Interactive Holograms in Iron Man

[RubinLicht]

I assume most people know what I'm talking about. I've done some mild googling regarding hologram technology, but currently technology isn't nearly as robust as what Stark has in the movies, and I'm not so interested in that aspect anyways.

How would you set up a room so that you can interact with a hologram, assuming the hologram technology exists?

My thoughts currently:
1) Insertion of more subcutaneous electronic devices. like the ones he puts in his arms in Iron Man 3 to allow the suit to fly to him and suit up. Set up sensors in the room that track the devices. The rest is just a matter of encoding hand gestures in a comfortable way.
2) I can't think of any other way with my limited scientific education actually...

Feel free to discuss more advanced concepts, I'll just do research as needed.

 

[BillTre]

Sounds the system you are describing uses something like motion capture, which is used in the motion picture industry, as well as other places.

The position of limbs (or whatever) can be tracking visually or by using other electronic means.
I have heard of researchers using electromagnets on animal appendages for that purpose.
Motion capture usually uses points on someone's body surface which makes the tracking easier.
I would bet this will soon be done without the special tracking spots.

On the other hand, doesn't the Wii already recognize some crude hand movements?