If you simply use a pair of digital sensors with a 15 stop exposure offset between them (seems fair - humans have two…), thats ~30 stops in a single shot if we assume best we get is 15 from a digital sensor. Again though with high-speed exposure blending and one sensor this is not really necessary in a lot of cases.
The practical reality is digital capture can exceed 21 stops and you don’t need particularly fancy equipment to do it. Two decent cellphone grade sensors (~12-14 stops) would be enough if you don’t want to do single sensor blends and would work well for real-time video applications.
The only way I could imagine that we are superior to phone cameras is stabilisation, something that could be resolved with vertical integration that informs the sensors and image processing units about forces being applied to the vehicle (though this is coming from somebody outside the field so take it with many grains of salt).
This strikes me as a pretty odd statement to make, personally!
“There is no real comparison” - for the benefit of the less informed, please make the comparison, assuming you are able.