Even TrackIR wouldn't really help, as you still have things moving around. The feel I'm trying to replicate is, like I described above, one where you can sit in the driver's seat of your car, close your eyes, and turn on the radio, cruise control, and change the heat setting or fan selection. I feel like 2D cockpits are the closest you can get to this in X-Plane, because once you have your mouse at a reference point (say the heading select on an airliner) you know you go way down to get the FMC, or maybe left a bit to change your view range on the horizontal display. It still doesn't come close to the ideal situation of having a sim pit as you said, but I believe it to be much better than any 3D option. The one time I really find myself wanting the TrackIR is when I'm flying GA and am working out the windows instead of in the cockpit throwing switches and spinning knobs. That would be cool...