This is a Canon BSI stacked sensor, not a Sony, so we have no idea what features could emerge. Stacked sensors theoretically allow for an enormous amount of signal processing in the sensor. This leaves the opportunity open for on-sensor interpolation and therefore variable resolution without cropping. The R5 has low ISO noise reduction in the RAWs, so Canon has made it clear that they are not afraid of pre-processing. Once you open that door, the sensor could be 100 MP and spit out 30 or 45 MP images at high speed and higher res images at somewhat lower speed so as to not overload data cards. Not in any way suggesting that this is what has been done, but rather pointing out that any number of major surprises are quite possible. It is unlikely that Canon is fabbing the processor layer of the stacked sensor (equally unlikely that Sony does as well), so much depends on the geometry of that layer. If it is even as small as 14nm, the possibilities are pretty much endless. We are talking about an available area 35% larger than the biggest GPU chips. It clearly has to clock at much lower speeds, because 300W in the sensor is not practical and would be detrimental to the imaging section, but the amount of processing power would still be huge.