OLEDs are faster, lighter, and since they are their own source of light, they can be brighter and avoid color distortion due to viewing angle.
While potentially cheaper to produce, current lack of large scale mass production means high costs. Also, it remains to be seen whether or not issues with fast material degradation and color distortion (caused by uneven deterioration of the material) were overcome.
OLEDs, for the 8K Euro price tag, they can: write your homework for you, go to exams in your place, hold you and pat you on the back till you burp, have you graduate Hogwarts, tie your shoelaces for you, they basically can breath, drink, eat, sleep, talk, think and exist for you at that price!
So.. Yeah!.. OLEDs are awesome!