I know Vita ditched oled but the tech has made some improvements along with cheaper production and are now available in alot of phones.
The benefits would be much better picture quality. In addition to those gorgeous colors, OLED also allows the screen to refresh its pixels extremely quickly, reducing visual stutter in games. Also oled tech is more energy efficient then lcd and slightly thinner
At CES it looks like OLED is becoming cheaper and more affordable and even being used in Alienwares laptops
http://www.cnet.com/products/alienware-13-2016/







