The problem with software based error correction is ok say you take out the twitchyness of our unsupported hands in space, then how will you make minute edits? How would the software differentiate between twich and small wanted adjustment?
There is a reason that photographers use tripods instead of holding their cameras, human hands just aren't steady.
I think it may be wonderful for gestures like maybe moving windows or selecting a track but that would take more energy to move your hand constantly from your mouse up to in front of the screen constantly rather than a simple shortcut key.
Well, for what it's worth, I use a professional optical trackball instead of a mouse. Some plugins have rather small knobs but the software can be set so that it takes a wide sweep to adjust. I can imagine that a slower pointer speed coupled with acceleration would take care of this.
The biggest issue would be whether or not you can control two or more sliders at once, which is largely the point of using a control surface with physical sliders.
It might work or it might not but it's early days yet.
Human hands CAN be that steady. I've been working with a camera man who can sweep smoother than the tripod swivel with his hands. Just loads of practice. I use an airbrush and that requires a very steady hand, with nothing to support it. Just practice.
Another thing you might want to try is a pen tablet. Absolutely great for fine adjustments and after a while, you think you're moving knobs with your fingers. A fast and fluid means of painting in pattern blocks and programming a drum sequencer.
I set out with the idea of mapping everything to a physical control surface with knobs and sliders. Unfortunately, by the time I've selected a control template, on the controller, I can just grab it with the mouse/ trackball. Not as useful as I thought it would be. I now only use it for controlling mixer faders.