There is no way that Apple puts OLED in the Air and leaves the 11 pro just IPS....
So they either move the 11pro to miniled or, more likely, first move the 11pro to OLED next year and only 1-2 years later bring OLED to the air...
I think OLED in the 11pro makes more sense than on the 12.9 since OLED allows to make devices slightly thinner and lighter, while with miniled it's the opposite....
And for the usual OLED haters that came with the usual Pentile talk etc. There are good and bad OLED displays, you conveniently always talk about the bad ones, trying to imply they are all the same, they all need super high resolutions etc etc to look half-way decent. If Apple come with OLED they will pick the best ones, which don't need messing around with resolution etc, probably the ones that recent Samsung flagships use, or even better ones. And they will calibrate them better than Samsung does.