Not strictly answering the question, but something I've been thinking about in this area recently.
In regards to ergonomics, it's right under our noses but it seems to be overlooked - cars' seats seem to have perfect ergonomics. I can sit in mine for 2 hours straight and have no desire to adjust anything at all, and getting out feel the same as before I got in, besides the unavoidable slight stiffness that'll come with any prolonged stillness like that. Compare to any other sitting arrangement, where I'll inevitably either want to adjust it over time, move in it a bit, or realize I've been sitting wrongly in it causing a minor back pain or the like. Maybe office desk/chair ergonomics need to take a cue from car interiors.