O las características dadas por Toshiba son erróneas o bien en esta review mienten: Toshiba ZL2 4K Glasses-Free 3D TV: Pictures & First Impressions

Ahí dice que la ZL2 es EDGE LED y que el 3D sin gafas deja MUCHO que desear.

Aunque claro, también dice:

Again, let's not forget that this is a prototype and that the final ZL2 could still be improved before it goes on sale (in December!). However, darker scenes showed up the main weakness of the TV's Edge LED backlighting—which is pretty surprising choice for a top-of-the-range model! As is all too often the case with this kind of technology, the screen is subject to clouding—little grey blotches that crop up in solid black parts of the image.
Por lo que puede ser que ellos probaran un prototipo de ZL2 y que luego, en el último momento, Toshiba cambiase el modelo de EDGE a Full LED...pero me extrañaría bastante.