The SaddleCo saddle tried to do exactly that - duplicate an Aeron chair - with mixed results. Most users reported feeling the rigid edges was worse than having the flexible center. Another humorous side effect was water going straight off your rear tire and on your butt.
I like what Specialized has tried to do, and Fizik does a little, with education and a range of saddles to fit different widths/butts (or spirit animals in the Fizik instance). The seats themselves resemble other seats but at least they are targeting users better and doing more up-front work so that the chances of it fitting right away are better.
To be clear, we are talking about performance saddles, not comfort/upright/cruiser bike saddles, right?
Maybe its not about the shape, but the materials. Like how the H-M research tied comfort to heat and ventilation, thus the Aeron and Mirra chairs.