FWIW, some speculation on how Apple might offer a laptop OLED without fear of burn-in.
1) A report out of Korea last year said that Samsung was going to use a tandem OLED for the iPad. That is an OLED that basically stacks emitter layers to give the display a longer lifetime. LG says that they use this in their auto OLED displays and it increases the lifetime by 4x.
2) The problem is that a tandem OLED increases the power consumption. However, in the summary for a technical paper that they are giving in May, Samsung says that they are "fairly near" to putting a phosphorescent blue into commercial devices. This would solve the power consumption problem. If Samsung has solved this, we can also expect a big drop in power consumption for future iPhone displays.
More details if anybody is interested.