Last year Qualcomm announced that they no longer plan to mass produce Mirasol displays, but during SID they unveiled their latest panels, and obviously they are still developing the technology. The company's latest panels feature a very high pixel density (557 PPI). The 5.1" panel has a resolution of 2560x1440 while the 1.5" panel's resolution is 600x600:

Mirasol displays are very power efficient (they draw about a sixth of the power required by a similar OLED or LCD panel). On the other hand, the color reproduction isn't up to par with LCDs or OLEDs. Still this is an interesting technology to watch.

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters