Actually, greater resolutions do make sense at 5.5" if the screen has a pentile grid. 1080p might mean good old LCD-IPS again and no jump to OLED yet by OnePlus, which is great news in my opinion, since cheap OLED screens suck hard and have a very short life (even under a year before ghosting on the moto x), and good OLED is still too expensive. OR, it could mean a beautiful OLED with perfect square pixels, but that's unlikely.