I'm not part of the team that makes such decisions, being a lowly software engineer that never got any good at EE. However, as one who was at least in the room

I'm not part of the team that makes such decisions, being a lowly software engineer that never got any good at EE. However, as one who was at least in the room when such decisions were discussed, I believe the decision-making process consisted of "OLED would be way cooler, and they're not that expensive these days". I'm pretty sure that is the sum total of that "engineering" decision. :-) But I will say that the OLED looks a lot better than most LCDs of that type that I've seen. EDIT: oh, yeah; sibling comment says something about backlighting an LCD, which might have had something to do with it, as the OLED replaces a seven-segment LED display from the previous generation (which, duh, also doesn't need a backlight).