Current OLED screens have too many problems, including extremely high price (5x-8x that of LED backlit LCD), over-saturation of certain colors (particularly oranges and reds), inaccurate color (limited gamut and hues not always accurate), short pixel life, and extremely hard to see in full daylight. I think Apple is all in on LED-backlit LCD technology. It's not as sexy, but it's mature and stable. OLED is exciting technology, don't get me wrong, I just think it's a couple years away from being viable for a larger-screen, mass product. Besides, the iPad's IPS display is beautiful.