I do think G-Speak has potential applications in dealing specifically with complex three-dimensional data. It's not going to replace what we use every day on th

I do think G-Speak has potential applications in dealing specifically with complex three-dimensional data. It's not going to replace what we use every day on the desktop, because most of what we do on the desktop works in two dimensions, but for actually manipulating visual interfaces that are, of necessity, presented in three dimensions, there's nothing like actually moving in 3D. If common desktop applications do, at some point, evolve to meaningfully take advantage of 3D visual interfaces, it could trickle down to a system that assumes a more natural posture (try resting your arms on your desk and gesturing above your keyboard: I think that could work). We've had hardware-accelerated 3D on the desktop for a decade, though, and have yet to see anything substantial come of it for traditionally two-dimensional UIs apart from sometimes-helpful transitional animations. Things could change, but I think applying gestures and multi-touch to 2D (a la 10/GUI, naturally) shows the most promising way forward.