It has got to be ProMotion. I can just see Apple announcing the next gen Pro Models next year and using the “Pro” buzzword that they just seem to be throwing around all over the lineup these days and introducing a ProMotion display on next year’s Pro lineup. It’s a shame because they should have introduced it on the iPhone 12 Pro this year but they chose not to. Perhaps they couldn’t get the display suppliers to supply enough displays on time due to the pandemic? Perhaps. But perhaps they did it on purpose to have another significant “Pro” feature to add to next year’s iPhone Pro lineup to make additional sales