Having watched this video featuring G-Speak's spatial operating environment I have this question: "why?" And I think the answer is: "because they can".
You may initially go "wow" but would you use it? I cant say I'd want to slip on a pair of gloves and then perform like that. Ok RSI could become a thing of the past, but there's something about the simple interaction with a mouse and keyboard that makes sense.
I remember a similar concept with music. A device that used gloves to play an air instrument. The singer from Marillion demoed it on some kids program. Jean Michel Jarre strutted his stuff with it in his huge impressive concerts. But for the rest of the musician world they connected with their instruments.
While the lab technicians feel proud that they've stepped outside of the box and broken new boundaries I think sometimes technology is taking us to places we have no desire to go to.
Would you use this kind of environment? I don't think I will.