Some Analysis of Magic Leap Tech Without the Bias (That said I believe Optinvent Uses an OLED Display in Their AR Glasses, I'll call it a dispassionate presentation)

The claimed system will have a very high cost and very low yield in comparison to other display technologies like OLED, LCD, etc.combined with collimated beam systems.

http://www.optinvent.com/magic-leap-analysis-dispelling-some-of-the-myths