If you wondered how does the new Triluminous display technology of Sony apply to mobile devices, as present in the Xperia Z Ultra phablet, this short comparison below will answer some of your questions.
The 6.4" panel gets pitted against one of the best mobile displays out there - Super LCD3 on the HTC One - as well as the exotic Super AMOLED Full HD screen of the Galaxy S4.
The advantage of Sony's "quantum dot" Triluminous tech is that the it can display much more color hues than usual for vibrant image that does not look oversaturated, as is so often the case with OLED screens, for example. Sony's phablet also sports pretty deep black levels for an LCD screen, and low reflectance ratio outdoors, so have a look how it fares against some of the best in its class.
One thing is clear - the top mobile displays are getting very close in terms of the high quality they bring. Coupled with their top-notch pixel densities, you'd be hard pressed to find caveats with the screen, regardless of which one you choose.